ID   CAS2_STRG1              Reviewed;         109 AA.
AC   F5WVJ2;
DT   13-JUN-2012, integrated into UniProtKB/Swiss-Prot.
DT   27-JUL-2011, sequence version 1.
DT   03-AUG-2022, entry version 38.
DE   RecName: Full=CRISPR-associated endoribonuclease Cas2 {ECO:0000255|HAMAP-Rule:MF_01471};
DE            EC=3.1.-.- {ECO:0000255|HAMAP-Rule:MF_01471};
GN   Name=cas2 {ECO:0000255|HAMAP-Rule:MF_01471}; OrderedLocusNames=SGGB_1439;
OS   Streptococcus gallolyticus (strain ATCC 43143 / F-1867).
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Streptococcaceae;
OC   Streptococcus.
OX   NCBI_TaxID=981539;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 43143 / F-1867;
RX   PubMed=21633709; DOI=10.1371/journal.pone.0020519;
RA   Lin I.-H., Liu T.-T., Teng Y.-T., Wu H.-L., Liu Y.-M., Wu K.-M.,
RA   Chang C.-H., Hsu M.-T.;
RT   "Sequencing and comparative genome analysis of two pathogenic Streptococcus
RT   gallolyticus subspecies: genome plasticity, adaptation and virulence.";
RL   PLoS ONE 6:E20519-E20519(2011).
CC   -!- FUNCTION: CRISPR (clustered regularly interspaced short palindromic
CC       repeat), is an adaptive immune system that provides protection against
CC       mobile genetic elements (viruses, transposable elements and conjugative
CC       plasmids). CRISPR clusters contain sequences complementary to
CC       antecedent mobile elements and target invading nucleic acids. CRISPR
CC       clusters are transcribed and processed into CRISPR RNA (crRNA).
CC       Functions as a ssRNA-specific endoribonuclease. Involved in the
CC       integration of spacer DNA into the CRISPR cassette. {ECO:0000255|HAMAP-
CC       Rule:MF_01471}.
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01471};
CC   -!- SUBUNIT: Homodimer, forms a heterotetramer with a Cas1 homodimer.
CC       {ECO:0000255|HAMAP-Rule:MF_01471}.
CC   -!- SIMILARITY: Belongs to the CRISPR-associated endoribonuclease Cas2
CC       protein family. {ECO:0000255|HAMAP-Rule:MF_01471}.
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DR   EMBL; AP012053; BAK28299.1; -; Genomic_DNA.
DR   AlphaFoldDB; F5WVJ2; -.
DR   SMR; F5WVJ2; -.
DR   EnsemblBacteria; BAK28299; BAK28299; SGGB_1439.
DR   KEGG; sgt:SGGB_1439; -.
DR   PATRIC; fig|981539.3.peg.1442; -.
DR   HOGENOM; CLU_150500_1_1_9; -.
DR   OMA; TDKQFGM; -.
DR   Proteomes; UP000007945; Chromosome.
DR   GO; GO:0004521; F:endoribonuclease activity; IEA:InterPro.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0051607; P:defense response to virus; IEA:UniProtKB-UniRule.
DR   GO; GO:0043571; P:maintenance of CRISPR repeat elements; IEA:UniProtKB-UniRule.
DR   HAMAP; MF_01471; Cas2; 1.
DR   InterPro; IPR021127; CRISPR_associated_Cas2.
DR   InterPro; IPR019199; Virulence_VapD/CRISPR_Cas2.
DR   Pfam; PF09827; CRISPR_Cas2; 1.
DR   TIGRFAMs; TIGR01573; cas2; 1.
PE   3: Inferred from homology;
KW   Antiviral defense; Endonuclease; Hydrolase; Magnesium; Metal-binding;
KW   Nuclease.
FT   CHAIN           1..109
FT                   /note="CRISPR-associated endoribonuclease Cas2"
FT                   /id="PRO_0000417728"
FT   BINDING         8
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01471"
SQ   SEQUENCE   109 AA;  12751 MW;  6A014F6588755017 CRC64;
     MRMILMFDMP TETAEERKAY RKFRKFLLSE GFIMHQFSVY SKLLLNNSAN KAMIDRLQAN
     NPKKGSITLL TVTEKQFARM IYLNGERNTS VANSDRRLVF LGEDYSDEN