3OQ2

Structure of a CRISPR associated protein Cas2 from Desulfovibrio vulgaris

PDB DOI: https://doi.org/10.2210/pdb3OQ2/pdb

Classification: IMMUNE SYSTEM
Organism(s): Desulfovibrio vulgaris str. Hildenborough
Expression System: Escherichia coli BL21(DE3)
Mutation(s): No

Deposited: 2010-09-02 Released: 2010-12-22
Deposition Author(s): Samai, P., Smith, P., Shuman, S.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.35 Å
R-Value Free: 0.177
R-Value Work: 0.128
R-Value Observed: 0.130

wwPDB Validation 3D Report Full Report

This is version 1.2 of the entry. See complete history.

Literature

Structure of a CRISPR-associated protein Cas2 from Desulfovibrio vulgaris.

Samai, P., Smith, P., Shuman, S.

(2010) Acta Crystallogr Sect F Struct Biol Cryst Commun 66: 1552-1556

PubMed: 21139194 Search on PubMedSearch on PubMed Central
DOI: https://doi.org/10.1107/S1744309110039801
Primary Citation of Related Structures:
3OQ2

PubMed Abstract:
CRISPRs (clustered regularly interspaced short palindromic repeats) provide bacteria and archaea with RNA-guided acquired immunity to invasive DNAs. CRISPR-associated (Cas) proteins carry out the immune effector functions. Cas2 is a universal component of the CRISPR system. Here, a 1.35 Å resolution crystal structure of Cas2 from the bacterium Desulfovibrio vulgaris (DvuCas2) is reported. DvuCas2 is a homodimer, with each protomer consisting of an N-terminal βαββαβ ferredoxin fold (amino acids 1-78) to which is appended a C-terminal segment (amino acids 79-102) that includes a short 3(10)-helix and a fifth β-strand. The β5 strands align with the β4 strands of the opposite protomers, resulting in two five-stranded antiparallel β-sheets that form a sandwich at the dimer interface. The DvuCas2 dimer is stabilized by a distinctive network of hydrophilic cross-protomer side-chain interactions.

Organizational Affiliation

Molecular Biology Program, Sloan-Kettering Institute for Cancer Research, USA.

Macromolecule Content

Total Structure Weight: 25.13 kDa
Atom Count: 2,111
Modelled Residue Count: 201
Deposited Residue Count: 206
Unique protein chains: 1

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CRISPR-associated protein Cas2	A, B	103	Desulfovibrio vulgaris str. Hildenborough	Mutation(s): 0 Gene Names: cas2, DVUA0135 EC: 3.1
UniProt
Find proteins for Q72WF4 (Desulfovibrio vulgaris (strain ATCC 29579 / DSM 644 / NCIMB 8303 / VKM B-1760 / Hildenborough)) Explore Q72WF4 Go to UniProtKB: Q72WF4
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	Q72WF4
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
CIT Query on CIT Download Ideal Coordinates CCD File SDF format, chain I [auth A] SDF format, chain K [auth B] SDF format, chain L [auth B] MOL2 format, chain I [auth A] MOL2 format, chain K [auth B] MOL2 format, chain L [auth B]	I [auth A], K [auth B], L [auth B]	CITRIC ACID C₆ H₈ O₇ KRKNYBCHXYNGOX-UHFFFAOYSA-N		Interactions Focus chain I [auth A] Focus chain K [auth B] Focus chain L [auth B] Interactions & Density Focus chain I [auth A] Focus chain K [auth B] Focus chain L [auth B]
TRS Query on TRS Download Ideal Coordinates CCD File SDF format, chain D [auth A] MOL2 format, chain D [auth A]	D [auth A]	2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL C₄ H₁₂ N O₃ LENZDBCJOHFCAS-UHFFFAOYSA-O		Interactions Focus chain D [auth A] Interactions & Density Focus chain D [auth A]
SO4 Query on SO4 Download Ideal Coordinates CCD File SDF format, chain F [auth A] SDF format, chain G [auth A] SDF format, chain H [auth A] SDF format, chain J [auth A] SDF format, chain M [auth B] MOL2 format, chain F [auth A] MOL2 format, chain G [auth A] MOL2 format, chain H [auth A] MOL2 format, chain J [auth A] MOL2 format, chain M [auth B]	F [auth A], G [auth A], H [auth A], J [auth A], M [auth B]	SULFATE ION O₄ S QAOWNCQODCNURD-UHFFFAOYSA-L		Interactions Focus chain F [auth A] Focus chain G [auth A] Focus chain H [auth A] Focus chain J [auth A] Focus chain M [auth B] Interactions & Density Focus chain F [auth A] Focus chain G [auth A] Focus chain H [auth A] Focus chain J [auth A] Focus chain M [auth B]
CL Query on CL Download Ideal Coordinates CCD File SDF format, chain E [auth A] MOL2 format, chain E [auth A]	E [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M		Interactions Focus chain E [auth A] Interactions & Density Focus chain E [auth A]
NA Query on NA Download Ideal Coordinates CCD File SDF format, chain C [auth A] MOL2 format, chain C [auth A]	C [auth A]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N		Interactions Focus chain C [auth A] Interactions & Density Focus chain C [auth A]