ISDA

Deposition Date 2012-08-11

Release Date 2013-01-23

Last Version Date 2023-11-08

Entry Detail

PDB ID:

4GKF

Keywords:

UNKNOWN FUNCTION

Title:

Crystal structure and characterization of Cmr5 protein from Pyrococcus furiosus

Biological Source:

Source Organism:

Pyrococcus furiosus (Taxon ID: 186497)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.10 Å

R-Value Free:

0.27

R-Value Work:

0.21

R-Value Observed:

0.21

Space Group:

P 43 21 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:CRISPR system Cmr subunit Cmr5
Gene (Uniprot):cmr5
Chain IDs:A, B
Chain Length:169
Number of Molecules:2
Biological Source:Pyrococcus furiosus

UniProt ID:Q8U1T0 Pfam ID:PF09701

Primary Citation

Crystal structure of Cmr5 from Pyrococcus furiosus and its functional implications

Park, J.H, Sun, J, Park, S.Y, Hwang, H.J, Park, M.Y, Shin, M, Kim, J.S.Show

Febs Lett. 587 562 568 (2013)

PMID: 23370277 DOI: 10.1016/j.febslet.2013.01.029

Abstact

The bacterial acquired immune system consists of clustered regularly interspaced short palindromic repeats (CRISPRs) and CRIPSR-associated (Cas) genes, which include Cas-module repeat-associated mysterious proteins (Cmr). The six Cmr proteins of Pyrococcus furiosus (pfCmr1-pfCmr6) form a Cmr effector complex that functions against exogenous nucleic acid. Among the Cmr proteins, the role of pfCmr5 and its involvement in the complex's cleavage activity have been obscure. The elucidated pfCmr5 structure has two inserted α-helices compared with the other trimeric Cmr5 structure. However, pfCmr5 exists as a monomeric protein both in the crystalline state and in solution. In vitro assays indicate that pfCmr5 interacts with pfCmr4. These structural and biophysical data might help in understanding the complicated and ill-characterized Cmr effector complex.

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Primary Citation of related structures