ID   CAS1_GEOSL              Reviewed;         306 AA.
AC   Q74DC4;
DT   16-MAY-2012, integrated into UniProtKB/Swiss-Prot.
DT   05-JUL-2004, sequence version 1.
DT   03-AUG-2022, entry version 84.
DE   RecName: Full=CRISPR-associated endonuclease Cas1 {ECO:0000255|HAMAP-Rule:MF_01470};
DE            EC=3.1.-.- {ECO:0000255|HAMAP-Rule:MF_01470};
GN   Name=cas1 {ECO:0000255|HAMAP-Rule:MF_01470}; OrderedLocusNames=GSU1392;
OS   Geobacter sulfurreducens (strain ATCC 51573 / DSM 12127 / PCA).
OC   Bacteria; Proteobacteria; Deltaproteobacteria; Desulfuromonadales;
OC   Geobacteraceae; Geobacter.
OX   NCBI_TaxID=243231;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 51573 / DSM 12127 / PCA;
RX   PubMed=14671304; DOI=10.1126/science.1088727;
RA   Methe B.A., Nelson K.E., Eisen J.A., Paulsen I.T., Nelson W.C.,
RA   Heidelberg J.F., Wu D., Wu M., Ward N.L., Beanan M.J., Dodson R.J.,
RA   Madupu R., Brinkac L.M., Daugherty S.C., DeBoy R.T., Durkin A.S.,
RA   Gwinn M.L., Kolonay J.F., Sullivan S.A., Haft D.H., Selengut J.,
RA   Davidsen T.M., Zafar N., White O., Tran B., Romero C., Forberger H.A.,
RA   Weidman J.F., Khouri H.M., Feldblyum T.V., Utterback T.R., Van Aken S.E.,
RA   Lovley D.R., Fraser C.M.;
RT   "Genome of Geobacter sulfurreducens: metal reduction in subsurface
RT   environments.";
RL   Science 302:1967-1969(2003).
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 spacers, sequences complementary to
CC       antecedent mobile elements, and target invading nucleic acids. CRISPR
CC       clusters are transcribed and processed into CRISPR RNA (crRNA). Acts as
CC       a dsDNA endonuclease. Involved in the integration of spacer DNA into
CC       the CRISPR cassette. {ECO:0000255|HAMAP-Rule:MF_01470}.
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01470};
CC       Name=Mn(2+); Xref=ChEBI:CHEBI:29035;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01470};
CC   -!- SUBUNIT: Homodimer, forms a heterotetramer with a Cas2 homodimer.
CC       {ECO:0000255|HAMAP-Rule:MF_01470}.
CC   -!- SIMILARITY: Belongs to the CRISPR-associated endonuclease Cas1 family.
CC       {ECO:0000255|HAMAP-Rule:MF_01470}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; AE017180; AAR34768.1; -; Genomic_DNA.
DR   RefSeq; NP_952445.1; NC_002939.5.
DR   RefSeq; WP_010942041.1; NC_002939.5.
DR   AlphaFoldDB; Q74DC4; -.
DR   SMR; Q74DC4; -.
DR   STRING; 243231.GSU1392; -.
DR   PRIDE; Q74DC4; -.
DR   EnsemblBacteria; AAR34768; AAR34768; GSU1392.
DR   KEGG; gsu:GSU1392; -.
DR   PATRIC; fig|243231.5.peg.1388; -.
DR   eggNOG; COG1518; Bacteria.
DR   HOGENOM; CLU_077904_0_0_7; -.
DR   InParanoid; Q74DC4; -.
DR   OMA; IWVGEAG; -.
DR   Proteomes; UP000000577; Chromosome.
DR   GO; GO:0003677; F:DNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0004520; F:endodeoxyribonuclease 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   CDD; cd09719; Cas1_I-E; 1.
DR   Gene3D; 1.20.120.920; -; 1.
DR   Gene3D; 3.100.10.20; -; 1.
DR   HAMAP; MF_01470; Cas1; 1.
DR   InterPro; IPR033641; Cas1_I-E.
DR   InterPro; IPR002729; CRISPR-assoc_Cas1.
DR   InterPro; IPR042206; CRISPR-assoc_Cas1_C.
DR   InterPro; IPR019851; CRISPR-assoc_Cas1_ECOLI.
DR   InterPro; IPR042211; CRISPR-assoc_Cas1_N.
DR   Pfam; PF01867; Cas_Cas1; 1.
DR   TIGRFAMs; TIGR00287; cas1; 1.
DR   TIGRFAMs; TIGR03638; cas1_ECOLI; 1.
PE   3: Inferred from homology;
KW   Antiviral defense; DNA-binding; Endonuclease; Hydrolase; Magnesium;
KW   Manganese; Metal-binding; Nuclease; Reference proteome.
FT   CHAIN           1..306
FT                   /note="CRISPR-associated endonuclease Cas1"
FT                   /id="PRO_0000417078"
FT   BINDING         143
FT                   /ligand="Mn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29035"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01470"
FT   BINDING         210
FT                   /ligand="Mn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29035"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01470"
FT   BINDING         223
FT                   /ligand="Mn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29035"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01470"
SQ   SEQUENCE   306 AA;  33572 MW;  BD6EE15D011D1577 CRC64;
     MQPQLPPLKP IPIKDRISVL YVERGNLDVL DGAFVVVDKT GVRTHLPVGG VACLMLEPGT
     RVSHAAVTLA SRIGCLLVWI GEAGVRLYAS GQPGGARADR LLYQAKLALD DSARLKVVRK
     MYALRFREEP PERRSVEQLR GIEGVRVRKM YELLARQHGV AWKARNYDHT QWESGDVPNR
     CLSSATACLY GICEAAILAA GYAPAVGFIH TGKPQSFVYD IADIFKFETV VPVAFRIAAK
     KPRDPEREVR LACRDAFRQS KILHRIIPTI EQVLAAGGMD VPTPPPESVE AVIPNKEGIG
     DAGHRG