ライフサイエンスコーパス: gRNA

1 targeting specificity of approximately 3,000 gRNAs across 30 therapeutically implicated loci.

2 t study has revealed that Dbr1 cleaves HIV-1 gRNA lariats that form early after viral entry.

3 To date, anti-HIV-1 gRNAs have been designed to account for off-target activ

4 is tests the ability of published anti-HIV-1 gRNAs to cleave publicly available patient-derived HIV-1

5 eletions in up to six genes by expressing 12 gRNAs from a single transcript.

6 ilico, D-LTR-P4-227913 (package of the top 4 gRNAs) accounted for all detectable genetic variation wi

7 In total, we measured the activity of 24,460 gRNAs with and without mismatches relative to the target

8 ed duplicated screens using a library with 6 gRNAs per gene as providing the best trade-off.

9 ration sequencing (NGS) showed that over 600 gRNAs including the ones targeting LGALS2 were highly en

10 ains a CRISPR/Cas9 system using SpCas9 and a gRNA targeting the exon of the rice AP2 domain-containin

11 m Escherichia coli that efficiently copies a gRNA cassette and adjacent cargo flanked with sequences

12 In addition, we expressed a gRNA array using a strong constitutive pol II promoter.

13 ures of HIV-1 replication, and the role of a gRNA lariat is not known.

14 Specific recognition of a gRNA packaging signal (Psi) has been proposed to stimula

15 on of a 20 nt RNA hairpin to the 5' end of a gRNA still supported RNP formation but produced a stable

16 ontrasted when combining microinjection of a gRNA/Cas9 ribonucleoprotein complex with a traditional H

17 tion in the progression of editing through a gRNA; however, they have distinct roles and REMC is like

18 over, we demonstrated that six different ABE-gRNA complexes could be examined in a single EndoV-seq a

19 g gRNA sequence diversity negatively affects gRNA distribution, leading to libraries of heterogeneous

20 d donors flanked by 100 nt homology arms and gRNA target sites cloned into a plasmid.

21 nd that maternal deposition of both Cas9 and gRNA is required to form resistance alleles in the early

22 the precise number of minicircle classes and gRNA genes was unknown.

23 ns and promote infectious SFV production and gRNA packaging.

24 eins (RNPs; Cas9 protein or Cpf1 protein and gRNA) into day-0.7 pregnant mice, which made it suitable

25 by splitting the drive components, Cas9 and gRNAs, into separate alleles to form a trans-complementi

26 ls that express both the dCas9 effectors and gRNAs.

27 nprecedented organization of minicircles and gRNAs in T. lewisi broadens our knowledge of the structu

28 The rRNAs and gRNAs are 3' uridylated.

29 twice as effective in inducing mutations as gRNAs expressed from individual RNA polymerase III promo

30 h blockage of viral reverse transcriptase at gRNA branch points.

31 cells to inhibit type I IFN induction before gRNA replication and without the need for further de nov

32 n designing screens and constructing bespoke gRNA libraries.

33 ement for long stretches of homology between gRNA and DNA target.

34 ng and fixed cells, the interactions between gRNA and wild-type Gag or Gag mutants carrying deletions

35 e web interface of pgRNAFinder contains both gRNA search and scoring system.

36 ration protein (Mat), and then the Mat-bound gRNA is released from the viral capsid and somehow cross

37 viruses) supported translationin vitro, but gRNA did not accumulate to detectable levels in protopla

38 Knockdown efficacy is driven by gRNA-specific features and target site context.

39 2 coat protein and subsequently recruited by gRNA aptamer binding to a nuclease competent CRISPR comp

40 Caged gRNAs are generated by substituting four nucleobases eve

41 Caged gRNAs are novel tools for the conditional control of gen

42 ss promiscuous than wild type when canonical gRNA was used, but HypaCas9 had much-reduced on-target u

43 y and high on-target activity with canonical gRNA.

44 using various combinations of non-canonical gRNAs and different Cas9s.

45 Non-canonical gRNAs and new engineered variants of Cas9 have been deve

46 closed-circular-synthesized (3Cs) CRISPR/Cas gRNA reagents and that uncouples sequence diversity from

47 iably evaluate the specificity of RGEs, Cas::gRNA pairs, and gain insight into the mechanism and ther

48 lerate this CRISPR assay by cofocusing Cas12-gRNA, reporters, and target within a microfluidic chip.

49 This assay utilizes a custom CRISPR Cas12a/gRNA complex and a fluorescent probe to detect target am

50 nd, using our model, predict optimized Cas13 gRNAs for all protein-coding transcripts in the human ge

51 Cas9-gRNA interactions are crucial for complex assembly, but

52 believe that CNS delivery of NF (CRISPR/Cas9-gRNA-MENPs) across the BBB certainly will have clinical

53 rom either failure to form a functional Cas9-gRNA complex or inability to recognize targets in vivo.

54 ity to competitively affect the rate of Cas9-gRNA binding to fluorescently labeled target DNA derivat

55 previously uncharacterized features of Cas9-gRNA complex formation.

56 9 nucleases complexed with a guide RNA (Cas9-gRNA) find their targets by scanning and interrogating t

57 Cas9/gRNA-mediated gene-drive systems have advanced developme

58 mvent these limitations, we screened 14 Cas9/gRNA combinations for specific and efficient disruption

59 CRISPR-Cas9/gRNA exhibits therapeutic efficacy against latent human

60 delivering a CRISPR plasmid expressing Cas9/gRNA and a single-stranded oligodeoxynucleotide HDR dono

61 of a nano-formulation (NF), composed of Cas9/gRNA bound with magneto-electric nanoparticles (MENPs),

62 d of 60 Oe was applied on NF to release Cas9/gRNA from MENPs surface and to facilitate NF cell uptake

63 significantly in comparison to unbound Cas9/gRNA in HIV latent hmuglia/HIV (HC69) cells.

64 echanistic understanding of how various Cas9/gRNA combinations perform in genome engineering.

65 a DNA sequence-modifying enzyme such as Cas9/gRNAs that disrupts endogenous versions of an essential

66 ility by preserving the ability to form Cas9:gRNA ribonucleoprotein complexes.

67 NA, resulting in a set of 55 high-confidence gRNA cleavage sites identified by both methods.

68 e that budding causes discrete changes in Cp-gRNA interactions.

69 udy, we reanalyzed the published CRISPR-Cpf1 gRNAs data and found many sequence and structural featur

70 KO of HNRNPF in human RPTCs (HK-2) by CRISPR gRNA up-regulated AGT and down-regulated SGLT2 expressio

71 we aimed to generate the largest up-to-date gRNA library that can be used to interrogate the coding

72 Systemic delivery of dCas9/gRNA by adeno-associated virus led to reductions in path

73 ntly created an AAV vector for Cre-dependent gRNA expression as well as three new transgenic rat line

74 Here, we define rules that determine gRNA effectiveness for transcriptional repression in Sac

75 NA expression construct]), up to 3 different gRNAs were transduced simultaneously to identify optimal

76 ano-OTS are first applied to three different gRNAs targeting HEK293 genomic DNA, resulting in a set o

77 As a consequence of the differential gRNA requirements, both Cas9 and Cpf1 enzymes can exhibi

78 oteins, thus identifying at least 7 distinct gRNA classes and 50 different PAM sequence requirements.

79 via its nucleocapsid (NC) domain and drives gRNA encapsidation at the plasma membrane (PM).

80 ack predictive rules for designing effective gRNA target sites.

81 The most effective gRNAs were first identified in fibroblast (C3H/10T1/2) a

82 Of the eight gRNAs we tested with ABE, 2-19 (with an average of 8.0)

83 inicircle categories both encoding essential gRNAs.

84 Not every gRNA elicits cleavage and the mechanisms that govern gRN

85 When extended gRNAs with one or two non-matching guanines added to the

86 rinciple use of multiplexed ribozyme flanked gRNAs to induce mutations in vivo in Drosophila melanoga

87 gRNAs) (SpCas9-gRNA, SaCas9-gRNA, and FnCas9-gRNA, respectively) and of three engineered SpCas9-gRNA

88 cated on chromosome 3 and uses Cas9 and four gRNAs to disrupt melanogaster technical knockout (tko),

89 y separating cellular mixtures of sgRNA from gRNA, is a unique advantage of our in-silico pipeline.

90 in completely abolished intracytoplasmic Gag-gRNA interactions.

91 verning the intracellular trafficking of Gag-gRNA complexes and their accumulation at the PM, we comp

92 ry of gRNA to the PM but did not prevent Gag-gRNA interactions in the cytoplasm, indicating that the

93 d to predict target efficiency for any given gRNAs.

94 cits cleavage and the mechanisms that govern gRNA activity have not been resolved.

95 easily assembled gene-specific guide-RNA (GS-gRNA) vectors.

96 imple and quick screening method to identify gRNA candidates for targeting HIV provirus in astrocytes

97 t the design of a novel pipeline to identify gRNAs that target HIV across a large number of infected

98 Furthermore, increasing gRNA sequence diversity negatively affects gRNA distribu

99 ing positive feedback loop due to increasing gRNA dosage.

100 on levels of the dCas9 effectors, individual gRNAs and targeted gene.

101 le patient-derived HIV-1 sequences to inform gRNA design and provides basic computational tools to re

102 eveal that both genomic context and internal gRNA interactions can interfere with Cas9-mediated cleav

103 irectly convert guide RNA (gRNA) inputs into gRNA outputs, enabling the gates to be 'wired' together.

104 A key aim in exploiting CRISPR-Cas is gRNA engineering to introduce additional functionalities

105 rget) is not clearly superior to full-length gRNAs (20 nt of complementarity), as truncated gRNAs are

106 Continued pilus retraction pulls the Mat-gRNA complex out of the virion into the T4SS channel, ca

107 A mini-gRNA library CRISPR-Cas9 validation screening shows 56%

108 efficiency of synthetic, chemically modified gRNAs and demonstrate induction of indels and large geno

109 ious genomic locations and carry two or more gRNAs, the first copying the e-CHACR and the second muta

110 Expressing multiple gRNAs in specific patterns enables multiplex cell-type-s

111 By efficiently co-expressing multiple gRNAs that target different genomic sites, the polycistr

112 s strategy allows the expression of multiple gRNAs for synergistic transcription activation of follis

113 ing platform, pMAGIC, that packages multiple gRNAs and either Sa-dCas9 or x-dCas9(3.7) fused to one o

114 Here, we report that multiple gRNAs linked with self-cleaving ribozymes and/or tRNA co

115 plexed gRNAs and that, with four multiplexed gRNAs, a mosquito species could potentially be suppresse

116 exponentially with the number of multiplexed gRNAs and that, with four multiplexed gRNAs, a mosquito

117 form and sustained expression of multiplexed gRNAs.

118 lexed CRISPR technologies, in which numerous gRNAs or Cas enzymes are expressed at once, have facilit

119 virus-like particles even in the absence of gRNA binding, whether viral RNA trafficking plays an act

120 eletion of either ZF delayed the delivery of gRNA to the PM but did not prevent Gag-gRNA interactions

121 agnostic and therapeutic use, the demands of gRNA synthesis have increased and access to tailored gRN

122 g-read sequencing protocols for detection of gRNA-driven digestion of genomic DNA by Cas9 in vitro.

123 e RNA (gRNA) scaffold and the development of gRNA on-target prediction algorithms, have since been ma

124 res features of the relative distribution of gRNA in the immature virion and increases the size of th

125 the improvements, and examined the effect of gRNA scaffold, number of gRNAs per gene and number of re

126 ding a non-matching guanine to the 5' end of gRNA influenced unwinding in a sequence-context dependen

127 We also report that entry of gRNA into the host cytoplasm requires the F-plasmid-enco

128 ngle-molecule assays to assess the impact of gRNA structural alterations on RNP complex formation, R-

129 We report the generation of a library of gRNA-expressing plasmids and fly lines using optimized t

130 Although the presence of gRNA in virions is required for viral infectivity, in it

131 ractions stabilize the tertiary structure of gRNA within the virion, which could further provide a ro

132 Caging confers complete suppression of gRNA:dsDNA-target hybridization and rapid restoration of

133 This study demonstrated that the use of gRNA/Cas9 ribonucleoprotein complex resulted in a high e

134 ession of the majority of both categories of gRNAs.

135 d time required for synthesis and cloning of gRNAs, allowing generation of CRISPRi libraries in wild-

136 is limited while tissue-specific delivery of gRNAs and Cas9 is desired.

137 structure of GuideScan enables the design of gRNAs that are more specific than those designed by exis

138 (RRE), which regulates the nuclear export of gRNAs and other intron-retaining viral RNAs.

139 tion rate but rather increased the number of gRNAs available for translation.

140 mined the effect of gRNA scaffold, number of gRNAs per gene and number of replicates on screen perfor

141 We used a set of gRNAs targeting repetitive elements-ranging in target co

142 PgRNAFinder offers gRNA design functionality for 8 vertebrate genomes.

143 On gRNA delivery targeting Mef2d expression, we recapitulat

144 ltiple Cp binding sites that are enriched on gRNA-specific regions and promote infectious SFV product

145 most of the existing computational tools on gRNA design are restricted to small deletions.

146 One gRNA identified in this screen outperformed the most pro

147 tissue-specific expression of more than one gRNAs for multiplex gene editing from a single pol II pr

148 DNA Targeting), to help users design optimal gRNAs for the CRISPR-Cpf1 system by considering both tar

149 ed a computational model to identify optimal gRNAs and confirm their generalizability, testing 3,979

150 c changes in association kinetics when other gRNA-target mismatches are present.

151 icity in vitro and also selectively packages gRNA in particles produced in mammalian cells.

152 of guide RNAs (gRNAs) for single- and paired-gRNA genome-wide screens.

153 system and two specificity-enhancing paired-gRNA systems: Cas9 D10A nickases (Cas9n) and dimeric RNA

154 ers to design single or distance-free paired-gRNA sequences.

155 iple application of a stable, multiplexed PB gRNA delivery system that can be widely exploited to fur

156 entially modulated by this strong protective gRNA that rescued yeast from alphaSyn toxicity when over

157 s9 cleavage assay showed that the top-ranked gRNA was the most effective at cleaving patient-derived

158 cellular RNAs and form particles resembling gRNA-containing particles.

159 ly bound to the 5' end of viral genomic RNA (gRNA) and associates with host eIF4E for successful infe

160 he maturation protein binds the genomic RNA (gRNA) and is required for attachment of the phage to the

161 l expression of the CP from the genomic RNA (gRNA) both in vitro and in vivo An absence of extensive

162 psid, priming the Mat-connected genomic RNA (gRNA) for its release from the virions.

163 lly selects the unspliced viral genomic RNA (gRNA) from the bulk of cellular and spliced viral RNAs v

164 erse transcription of the viral genomic RNA (gRNA) into DNA shortly after viral entry.

165 known about penetration of the genomic RNA (gRNA) into the cell.

166 otein (Cp) selectively packages genomic RNA (gRNA) into the viral nucleocapsid to produce infectious

167 Gag protein is responsible for genomic RNA (gRNA) packaging and immature viral particle assembly.

168 n the NS5 protein reduced viral genomic RNA (gRNA) replication rate to achieve a more favorable and r

169 Selective packaging of HIV-1 genomic RNA (gRNA) requires the presence of a cis-acting RNA element

170 lentiviral vector with one CRISPR guide RNA (gRNA) achieved potent and specific PTEN repression in hu

171 te up to seven mismatches between guide RNA (gRNA) and target DNA.

172 combinatorial mismatches between guide RNA (gRNA) and target nucleotides, both in the seed and in mo

173 genome editing is that unspecific guide RNA (gRNA) binding may induce off-target mutations.

174 is selectively targeted for Cas9/guide RNA (gRNA) cleavage, and a more general approach, copy-grafti

175 genome of cell lines to evaluate guide RNA (gRNA) efficiency, safety, and toxicity.

176 Truncation of guide RNA (gRNA) from the 5' end enables the application of a nucle

177 f NOR gates that directly convert guide RNA (gRNA) inputs into gRNA outputs, enabling the gates to be

178 ISPR-based gene-drive expresses a guide RNA (gRNA) into the genome at the site where the gRNA directs

179 od for rapid generation of custom guide RNA (gRNA) libraries using arrayed single-stranded oligonucle

180 Using a genome-wide guide RNA (gRNA) library, we found that targeting Nek7 rescued macr

181 ngle polycistronic vector and the guide RNA (gRNA) on a separate plasmid.

182 tospacer adjacent motif (PAM) and guide RNA (gRNA) requirements of 79 Cas9 proteins, thus identifying

183 nts, such as modifications to the guide RNA (gRNA) scaffold and the development of gRNA on-target pre

184 a) and Cas9, exhibit differential guide RNA (gRNA) sequence requirements for cleavage of the two stra

185 ary because of the differences in guide RNA (gRNA) sequences and genomic environments.

186 pf1 system varies among different guide RNA (gRNA) sequences.

187 We include guidelines for guide RNA (gRNA) target design, embryo injection and hatching, germ

188 s, we designed a disease-specific guide RNA (gRNA) targeting the R124H mutation of TGFBI, which cause

189 clease (Cas9) system depends on a guide RNA (gRNA) to specify its target.

190 CRISPR components (Cas9 mRNA and guide RNA (gRNA)) into the oviducts of pregnant females 1.5 d post

191 doxycycline and transfection with guide RNA (gRNA), donor DNA and piggyBac transposase resulted in ef

192 he dead Cas9 (dCas9) effector and guide RNA (gRNA), which can vary substantially depending on transge

193 enzyme complexes with a synthetic guide RNA (gRNA).

194 a library of 23,409 barcoded dual guide-RNA (gRNA) combinations and then perform a high-throughput po

195 By delivering Cas9 and guide-RNA (gRNA) with retro- or lenti-virus to IgM(+) mouse B cells

196 etic clones harboring individual guide RNAs (gRNA), we identify RNA-binding proteins (RBPs) that infl

197 Pol capsid proteins as well as genomic RNAs (gRNAs) packaged by Gag into virions undergoing assembly

198 ncisella novicida complexed with guide RNAs (gRNAs) (SpCas9-gRNA, SaCas9-gRNA, and FnCas9-gRNA, respe

199 (PEL) cells by coexpressing two guide RNAs (gRNAs) and Cas9 from a single expression vector in combi

200 gy to simultaneously express two guide RNAs (gRNAs) and Cas9 from a single expression vector in trans

201 ing system architecture in which guide RNAs (gRNAs) are multiplexed, increasing the effective homing

202 However, few published guide RNAs (gRNAs) are predicted to cleave the majority of HIV-1 vir

203 conjunction with unconventional guide RNAs (gRNAs) designed to induce loops at the target sites.

204 ines for the synthesis of Cas12a guide RNAs (gRNAs) for in vitro applications.

205 proteins and minicircles bearing guide RNAs (gRNAs) for mRNA editing.

206 an produces high-density sets of guide RNAs (gRNAs) for single- and paired-gRNA genome-wide screens.

207 wever, the features of effective guide RNAs (gRNAs) in different organisms have not been well charact

208 hough complexes between Cas9 and guide RNAs (gRNAs) offer remarkable specificity and versatility for

209 nd directed by hundreds of small guide RNAs (gRNAs) that base pair with mRNA.

210 on's disease (PD), we identified guide RNAs (gRNAs) that modulate transcriptional networks and protec

211 -based system that uses pairs of guide RNAs (gRNAs) to program thousands of kilobase-scale deletions

212 ey components of CRISPR/Cas9 are guide RNAs (gRNAs) which determine specific sequence targeting of DN

213 ting a haplolethal gene with two guide RNAs (gRNAs) while also providing a rescue allele.

214 of species of minicircle-encoded guide RNAs (gRNAs), but the precise number of minicircle classes and

215 ein 9 (Cas9), including specific guide RNAs (gRNAs), can excise integrated human immunodeficiency vir

216 e rules for the design of Cas13d guide RNAs (gRNAs), we conducted massively parallel screens targetin

217 One, germline-expressed Cas9 and guide RNAs (gRNAs)-the Cleaver-cleaves and thereby disrupts endogeno

218 photochemically activated, caged guide RNAs (gRNAs).

219 (AAV) vectors expressing Cas9 or guide RNAs (gRNAs).

220 simultaneously express multiple guide RNAs (gRNAs).

221 with the co-delivery of multiple guide RNAs (gRNAs).

222 nce to six different CRISPR/Cas9 guide RNAs (gRNAs).

223 vein injections of two vectors, AAV8-SaCas9-gRNA, targeting Alb intron 13, and AAV8-BDD-F8.

224 with guide RNAs (gRNAs) (SpCas9-gRNA, SaCas9-gRNA, and FnCas9-gRNA, respectively) and of three engine

225 ter users input query sequences, it searches gRNA by 3' protospacer-adjacent motif (PAM), and possibl

226 n the Drexel CARES Cohort was used to select gRNAs with predicted broad-spectrum activity.

227 dy has paved the way to express two separate gRNAs and the Cas9 enzyme simultaneously in the same cel

228 As expected, sequencing gRNA pairs before and after selection confirmed that all

229 constructed logic circuits with up to seven gRNAs, including repression cascades with up to seven la

230 oceed through numerous paths within a single gRNA and that non-linear modifications are essential, ge

231 the performance of our PB system for single gRNA delivery, confirming its utility for library format

232 how that targeting of these loci with single gRNAs leads to efficient and widespread methylation of t

233 CT-Finder accommodates the original single-gRNA Cas9 system and two specificity-enhancing paired-gR

234 respectively) and of three engineered SpCas9-gRNA variants with altered PAM specificities for short,

235 da complexed with guide RNAs (gRNAs) (SpCas9-gRNA, SaCas9-gRNA, and FnCas9-gRNA, respectively) and of

236 The relative affinities of SpCas9-gRNA and its engineered variants for canonical and subop

237 etic switches, each responding to a specific gRNA.

238 ession of both a multiplex of HIV-1-specific gRNAs and Cas9 in cells results in the modification and/

239 Using gene-specific gRNAs, we describe a pluripotency-specific lncRNA intera

240 these observations will assist in successful gRNA design.

241 monstrate the utility of combining synthetic gRNAs and dsDNA templates to perform homology directed r

242 using electroporation of modified synthetic gRNAs and Cas9 protein.

243 Utilizing synthetic gRNAs and linear dsDNA templates, we successfully perfor

244 thesis have increased and access to tailored gRNAs is now restrictive.

245 We also find that the best region to target gRNAs is between the transcription start site (TSS) and

246 ed with sequences homologous to the targeted gRNA/Cas9 cleavage site.

247 IRES region in vitro by use of both the TCV gRNA and reporter constructs did not reveal any sequence

248 uding the possible utilization of terminator gRNAs that preclude the 3' to 5' progression of editing.

249 We propose that gRNA is selectively packaged because binding to Psi nucl

250 , and large genomic sequence loss around the gRNA target site.

251 creased the loss of DNA sequences around the gRNA target site.

252 In the presence of Cas9, the gRNA cassette and any linked cargo sequences are copied

253 y suggesting that the IRES was active in the gRNA invivo Since the TCV CP also serves as the viral si

254 Following the initial validation of the gRNA and Cas12a components (1 d), the synthesis and test

255 Chemical modification of the gRNA and donor DNA has great potential for improving the

256 The tolerance of the gRNA and donor DNA to chemical modifications has the pot

257 ssembly, but several distinct regions of the gRNA are amenable to modification.

258 hich may facilitate the translocation of the gRNA from the capsid into the host cytosol.

259 city increase in vivo with truncation of the gRNA homology regions.

260 hich Psi promotes selective packaging of the gRNA is not well understood.

261 tes for Semliki Forest virus (SFV) Cp on the gRNA.

262 rly stage of capsid formation to promote the gRNA condensation required for genome packaging.

263 In addition, we demonstrate that the gRNA and donor DNA can be directly conjugated together i

264 This coat protein dimer binds to the gRNA and interacts with the buried alpha-region of A2, s

265 red allele located in close proximity to the gRNA cut site.

266 nomic DNA for sequences complementary to the gRNA.

267 The CRISPR screening was repeated using the gRNA resistant DCK, and loss of SLC29A was identified as

268 (gRNA) into the genome at the site where the gRNA directs Cas9-mediated cleavage.

269 pensable for the association of Gag with the gRNA in the cytosol.

270 eintegration of the region demarcated by the gRNAs in the vicinity of the edited locus.

271 Finally, the gRNAs linked by the self-cleaving ribozymes and tRNA cou

272 In this report, we demonstrate that the gRNAs of Cas9 and Cpf1, and donor DNA can be chemically

273 These results demonstrate that the gRNAs possess broad-spectrum cutting activity and could

274 Future studies will determine whether these gRNA dynamics represent fundamental features of retrovir

275 Moreover, these gRNAs and Cas9 protein were successfully tested on HIV l

276 gether into one molecule, and show that this gRNA-donor DNA conjugate is three times better at transf

277 The resulting increase in sfRNA relative to gRNA levels not only inhibited type I interferon (IFN) e

278 a common by-product of in vitro transcribed gRNA.

279 Using an improved triple gRNA expression system (TRISPR [triple gRNA expression c

280 riple gRNA expression system (TRISPR [triple gRNA expression construct]), up to 3 different gRNAs wer

281 ferent genomic sites, the polycistronic tRNA-gRNA gene (PTG) strategy enables multiplex gene editing

282 Truncated gRNA generally reduced unwinding and adding a non-matchi

283 NAs (20 nt of complementarity), as truncated gRNAs are generally less potent against both mismatched

284 associated virus (AAV)2/1-carrying truncated gRNAs targeting Myd88 and the MS2-HP1a-KRAB cassette.

285 ompetent CRISPR complex containing truncated gRNAs.

286 in human cells, the specificity of truncated gRNAs (18 nt of complementarity to the target) is not cl

287 Our study first demonstrates that truncated gRNAs to 18 complementary nucleotides and Cas9 nucleases

288 nomic location as a gene drive, carrying two gRNAs that cut on either side of the gene drive to excis

289 strategy entailed one-step injection of two gRNAs, Cas9 protein and a long-single-stranded-circular

290 R, with cationic polymers, than unconjugated gRNA and donor DNA.

291 Using gRNA targeting Klf15, we could enhance its transcription

292 modification of the nuclease protein, using gRNAs with a variety of patterns of mismatch to the inte

293 For in vivo delivery of the validated gRNA combinations, we employed systemic administration v

294 Various gRNAs were screened for their efficiencies against HIV p

295 urrently, branching and debranching of viral gRNA are not widely recognized as features of HIV-1 repl

296 oteins that is required to package the viral gRNA in its dominant conformation.

297 , early translation of the CP from the viral gRNA is likely important for countering host defenses.

298 When gRNA is expressed, it is selectively packaged despite th

299 support a model for Cas9 specificity wherein gRNA-DNA mismatches at PAM-distal bases modulate differe

300 nism, but also enabled sfRNA to compete with gRNA for packaging into infectious particles.