G
Giedrius Gasiunas
Researcher at Vilnius University
Publications - 38
Citations - 5961
Giedrius Gasiunas is an academic researcher from Vilnius University. The author has contributed to research in topics: Cas9 & CRISPR. The author has an hindex of 21, co-authored 35 publications receiving 4961 citations. Previous affiliations of Giedrius Gasiunas include University of Copenhagen & Novo Nordisk.
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Journal ArticleDOI
Cas9–crRNA ribonucleoprotein complex mediates specific DNA cleavage for adaptive immunity in bacteria
TL;DR: It is demonstrated that the Cas9–crRNA complex of the Streptococcus thermophilus CRISPR3/Cas system introduces in vitro a double-strand break at a specific site in DNA containing a sequence complementary to crRNA, paving the way for engineering of universal programmable RNA-guided DNA endonucleases.
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The Streptococcus thermophilus CRISPR/Cas system provides immunity in Escherichia coli
Rimantas Sapranauskas,Giedrius Gasiunas,Christophe Fremaux,Rodolphe Barrangou,Philippe Horvath,Virginijus Siksnys +5 more
TL;DR: The results show that active CRISPR/Cas systems can be transferred across distant genera and provide heterologous interference against invasive nucleic acids and can be leveraged to develop strains more robust against phage attack, and safer organisms less likely to uptake and disseminate plasmid-encoded undesirable genetic elements.
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Direct observation of R-loop formation by single RNA-guided Cas9 and Cascade effector complexes.
Mark D. Szczelkun,Maria S. Tikhomirova,Tomas Sinkunas,Giedrius Gasiunas,Tautvydas Karvelis,Patrizia Pschera,Virginijus Siksnys,Ralf Seidel +7 more
TL;DR: Single-molecule DNA supercoiling is used to directly observe and quantify the dynamics of torque-dependent R-loop formation and dissociation for both Cascade- and Cas9-based CRISPR-Cas systems and finds that Cascade has higher torque stability than Cas9 by using a conformational locking step.
Journal ArticleDOI
Cas3 is a single‐stranded DNA nuclease and ATP‐dependent helicase in the CRISPR/Cas immune system
Tomas Sinkunas,Giedrius Gasiunas,Christophe Fremaux,Rodolphe Barrangou,Philippe Horvath,Virginijus Siksnys +5 more
TL;DR: It is proposed that the Cas3 ATPase/helicase domain acts as a motor protein, which assists delivery of the nuclease activity to Cascade–crRNA complex targeting foreign DNA.
Journal ArticleDOI
crRNA and tracrRNA guide Cas9-mediated DNA interference in Streptococcus thermophilus
Tautvydas Karvelis,Giedrius Gasiunas,Algirdas Miksys,Rodolphe Barrangou,Philippe Horvath,Virginijus Siksnys +5 more
TL;DR: The Cas9-crRNA complex of the Streptococcus thermophilus DGCC7710 CRISPR3-Cas system functions as an RNA-guided endonuclease with crRNA-directed target sequence recognition and protein-mediated DNA cleavage.