5xus

Crystal structure of Lachnospiraceae bacterium ND2006 Cpf1 in complex with crRNA and target DNA (TTTA PAM)

spinqualitylabelsall models 5xus, resolution 2.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5xus is a 4 chain structure with sequence from Lachnospiraceae bacterium ND2006 and Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.5Å Ligands: EDO, MG, NA Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A182DWE3_9FIRM Publication Abstract from PubMed The RNA-guided Cpf1 (also known as Cas12a) nuclease associates with a CRISPR RNA (crRNA) and cleaves the double-stranded DNA target complementary to the crRNA guide. The two Cpf1 orthologs from Acidaminococcus sp. (AsCpf1) and Lachnospiraceae bacterium (LbCpf1) have been harnessed for eukaryotic genome editing. Cpf1 requires a specific nucleotide sequence, called a protospacer adjacent motif (PAM), for target recognition. Besides the canonical TTTV PAM, Cpf1 recognizes suboptimal C-containing PAMs. Here, we report four crystal structures of LbCpf1 in complex with the crRNA and its target DNA containing either TTTA, TCTA, TCCA, or CCCA as the PAM. These structures revealed that, depending on the PAM sequences, LbCpf1 undergoes conformational changes to form altered interactions with the PAM-containing DNA duplexes, thereby achieving the relaxed PAM recognition. Collectively, the present structures advance our mechanistic understanding of the PAM-dependent, crRNA-guided DNA cleavage by the Cpf1 family nucleases. Structural Basis for the Canonical and Non-canonical PAM Recognition by CRISPR-Cpf1.,Yamano T, Zetsche B, Ishitani R, Zhang F, Nishimasu H, Nureki O Mol Cell. 2017 Aug 17;67(4):633-645.e3. doi: 10.1016/j.molcel.2017.06.035. Epub, 2017 Aug 3. PMID:28781234 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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