ID   CAS1_THEPD              Reviewed;         327 AA.
AC   A1RZT8;
DT   16-MAY-2012, integrated into UniProtKB/Swiss-Prot.
DT   06-FEB-2007, sequence version 1.
DT   03-AUG-2022, entry version 67.
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=Tpen_1321;
OS   Thermofilum pendens (strain DSM 2475 / Hrk 5).
OC   Archaea; Crenarchaeota; Thermoprotei; Thermofilales; Thermofilaceae;
OC   Thermofilum.
OX   NCBI_TaxID=368408;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 2475 / Hrk 5;
RX   PubMed=18263724; DOI=10.1128/jb.01949-07;
RA   Anderson I., Rodriguez J., Susanti D., Porat I., Reich C., Ulrich L.E.,
RA   Elkins J.G., Mavromatis K., Lykidis A., Kim E., Thompson L.S., Nolan M.,
RA   Land M., Copeland A., Lapidus A., Lucas S., Detter C., Zhulin I.B.,
RA   Olsen G.J., Whitman W., Mukhopadhyay B., Bristow J., Kyrpides N.;
RT   "Genome sequence of Thermofilum pendens reveals an exceptional loss of
RT   biosynthetic pathways without genome reduction.";
RL   J. Bacteriol. 190:2957-2965(2008).
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}.
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DR   EMBL; CP000505; ABL78718.1; -; Genomic_DNA.
DR   RefSeq; WP_011752983.1; NC_008698.1.
DR   AlphaFoldDB; A1RZT8; -.
DR   SMR; A1RZT8; -.
DR   STRING; 368408.Tpen_1321; -.
DR   EnsemblBacteria; ABL78718; ABL78718; Tpen_1321.
DR   GeneID; 4602001; -.
DR   KEGG; tpe:Tpen_1321; -.
DR   eggNOG; arCOG01452; Archaea.
DR   HOGENOM; CLU_052779_0_0_2; -.
DR   OMA; TYDFSEM; -.
DR   OrthoDB; 70037at2157; -.
DR   Proteomes; UP000000641; Chromosome.
DR   GO; GO:0003677; F:DNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0004519; F:endonuclease activity; IEA:UniProtKB-UniRule.
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   Gene3D; 1.20.120.920; -; 1.
DR   HAMAP; MF_01470; Cas1; 1.
DR   InterPro; IPR002729; CRISPR-assoc_Cas1.
DR   InterPro; IPR042206; CRISPR-assoc_Cas1_C.
DR   Pfam; PF01867; Cas_Cas1; 1.
DR   TIGRFAMs; TIGR00287; cas1; 1.
PE   3: Inferred from homology;
KW   Antiviral defense; DNA-binding; Endonuclease; Hydrolase; Magnesium;
KW   Manganese; Metal-binding; Nuclease; Reference proteome.
FT   CHAIN           1..327
FT                   /note="CRISPR-associated endonuclease Cas1"
FT                   /id="PRO_0000417113"
FT   BINDING         149
FT                   /ligand="Mn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29035"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01470"
FT   BINDING         221
FT                   /ligand="Mn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29035"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01470"
FT   BINDING         235
FT                   /ligand="Mn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29035"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01470"
SQ   SEQUENCE   327 AA;  36349 MW;  4F3F7F54F61F3D67 CRC64;
     MRLLVLRGVD EVTVSSRSTV VIKSGNRVFE RALRDVDAVL VVGSGIKISS SLPPVLALHG
     IPLSILAKGH VAVLLNPVGT KYNNYRALQY TLPKNKALAI ALEYLKSRVR GMASIIRNRG
     GRLPALPEPP DPALYEDPAR LESDIRSWEA AASNTLWDEV FKLLDPSAAR ELRERYGFAG
     RKPGHPDPLN KAISAMYAVL YTLSTKALVA AGLDPTYGFL HRTQYSVPLA FDYAEAFKPL
     AVEAALDLVN EEGLPTLSED GDLDKDSLNK AMKRLYRYLS AKHRETGKTP YQQIHLKAFC
     LAKHLEGKCS REKLAFTWDK KRYIIHE