Structural features of Cas2 from Thermococcus onnurineus in CRISPR-cas system type IV

Tae Yang Jung, Kwang Hyun Park, Yan An, Alexy Schulga, Sergey Deyev, Jong Hyun Jung, Eui Jeon Woo

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

CRISPR-Cas is RNA-based prokaryotic immune systems that defend against exogenous genetic elements such as plasmids and viruses. Cas1 and Cas2 are highly conserved components that play an essential part in the adaptation stage of all CRISPR-Cas systems. Characterization of CRISPR-Cas genes in Thermococcus onnurineus reveals the association of the Cas2 gene with the putative type IV system that lacks Cas1 or its homologous genes. Here, we present a crystal structure of T. onnurineus Cas2 (Ton_Cas2) that exhibits a deep and wide cleft at an interface lined with positive residues (Arg16, Lys18, Lys19, Arg22, and Arg23). The obvious DNA recognizing loops in Cas2 from E. coli (Eco_Cas2) are absent in Ton_Cas2 and have significantly different shapes and electrostatic potential distributions around the putative nucleotide binding region. Furthermore, Ton_Cas2 lacks the hairpin motif at the C-terminus that is responsible for Cas1 binding in Eco_Cas2. These structural features could be a unique signature and indicate an altered functional mechanism in the adaptation stage of Cas2 in type IV CRISPR-Cas systems.

Original languageEnglish
Pages (from-to)1890-1897
Number of pages8
JournalProtein Science
DOIs
Publication statusPublished - 1 Oct 2016
Externally publishedYes

Fingerprint

CRISPR-Cas Systems
Clustered Regularly Interspaced Short Palindromic Repeats
Thermococcus
Genes
Static Electricity
Immune system
Immune System
Plasmids
Nucleotides
Viruses
RNA
Escherichia coli
Electrostatics
Crystal structure
DNA

Keywords

  • Cas2
  • CRISPR-Cas system
  • protein structure
  • Thermococcus onnurineus
  • type IV system

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology

Cite this

Jung, T. Y., Park, K. H., An, Y., Schulga, A., Deyev, S., Jung, J. H., & Woo, E. J. (2016). Structural features of Cas2 from Thermococcus onnurineus in CRISPR-cas system type IV. Protein Science, 1890-1897. https://doi.org/10.1002/pro.2981

Structural features of Cas2 from Thermococcus onnurineus in CRISPR-cas system type IV. / Jung, Tae Yang; Park, Kwang Hyun; An, Yan; Schulga, Alexy; Deyev, Sergey; Jung, Jong Hyun; Woo, Eui Jeon.

In: Protein Science, 01.10.2016, p. 1890-1897.

Research output: Contribution to journalArticle

Jung, Tae Yang ; Park, Kwang Hyun ; An, Yan ; Schulga, Alexy ; Deyev, Sergey ; Jung, Jong Hyun ; Woo, Eui Jeon. / Structural features of Cas2 from Thermococcus onnurineus in CRISPR-cas system type IV. In: Protein Science. 2016 ; pp. 1890-1897.
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