4GKF

Crystal structure and characterization of Cmr5 protein from Pyrococcus furiosus

Summary for 4GKF

• Entry DOI: 10.2210/pdb4gkf/pdb
• Descriptor: CRISPR system Cmr subunit Cmr5 (2 entities in total)
• Functional Keywords: crispr, unknown function
• Biological source: Pyrococcus furiosus
• Cellular location: Cytoplasm: Q8U1T0
• Total number of polymer chains: 2
• Total formula weight: 39433.59

Authors

Park, J.,Sun, J.,Park, S.,Hwang, H.,Park, M.,Shin, M.S. (deposition date: 2012-08-11, release date: 2013-01-23, Last modification date: 2023-11-08)

Primary citation

Park, J.H.,Sun, J.,Park, S.Y.,Hwang, H.J.,Park, M.Y.,Shin, M.,Kim, J.S.
Crystal structure of Cmr5 from Pyrococcus furiosus and its functional implications
Febs Lett., 587:562-568, 2013

PubMed Abstract: 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.

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

Experimental method

X-RAY DIFFRACTION (2.1 Å)