ID   CAS1D_METHJ             Reviewed;         347 AA.
AC   Q2FQQ2;
DT   16-MAY-2012, integrated into UniProtKB/Swiss-Prot.
DT   21-MAR-2006, sequence version 1.
DT   03-AUG-2022, entry version 78.
DE   RecName: Full=CRISPR-associated endonuclease Cas1 4 {ECO:0000255|HAMAP-Rule:MF_01470};
DE            EC=3.1.-.- {ECO:0000255|HAMAP-Rule:MF_01470};
GN   Name=cas1-4 {ECO:0000255|HAMAP-Rule:MF_01470}; OrderedLocusNames=Mhun_1858;
OS   Methanospirillum hungatei JF-1 (strain ATCC 27890 / DSM 864 / NBRC 100397 /
OS   JF-1).
OC   Archaea; Euryarchaeota; Stenosarchaea group; Methanomicrobia;
OC   Methanomicrobiales; Methanospirillaceae; Methanospirillum.
OX   NCBI_TaxID=323259;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 27890 / DSM 864 / NBRC 100397 / JF-1;
RX   PubMed=26744606; DOI=10.1186/s40793-015-0124-8;
RA   Gunsalus R.P., Cook L.E., Crable B., Rohlin L., McDonald E., Mouttaki H.,
RA   Sieber J.R., Poweleit N., Zhou H., Lapidus A.L., Daligault H.E., Land M.,
RA   Gilna P., Ivanova N., Kyrpides N., Culley D.E., McInerney M.J.;
RT   "Complete genome sequence of Methanospirillum hungatei type strain JF1.";
RL   Stand. Genomic Sci. 11:2-2(2016).
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; CP000254; ABD41575.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q2FQQ2; -.
DR   SMR; Q2FQQ2; -.
DR   STRING; 323259.Mhun_1858; -.
DR   PRIDE; Q2FQQ2; -.
DR   EnsemblBacteria; ABD41575; ABD41575; Mhun_1858.
DR   KEGG; mhu:Mhun_1858; -.
DR   eggNOG; arCOG01452; Archaea.
DR   HOGENOM; CLU_052779_1_0_2; -.
DR   OMA; YYVGSFY; -.
DR   Proteomes; UP000001941; 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   Gene3D; 1.20.120.920; -; 1.
DR   Gene3D; 3.100.10.20; -; 1.
DR   HAMAP; MF_01470; Cas1; 1.
DR   InterPro; IPR002729; CRISPR-assoc_Cas1.
DR   InterPro; IPR042206; CRISPR-assoc_Cas1_C.
DR   InterPro; IPR023843; CRISPR-assoc_Cas1_cyanobact.
DR   InterPro; IPR042211; CRISPR-assoc_Cas1_N.
DR   Pfam; PF01867; Cas_Cas1; 1.
DR   TIGRFAMs; TIGR00287; cas1; 1.
DR   TIGRFAMs; TIGR04093; cas1_CYANO; 1.
PE   3: Inferred from homology;
KW   Antiviral defense; DNA-binding; Endonuclease; Hydrolase; Magnesium;
KW   Manganese; Metal-binding; Nuclease; Reference proteome.
FT   CHAIN           1..347
FT                   /note="CRISPR-associated endonuclease Cas1 4"
FT                   /id="PRO_0000417104"
FT   REGION          1..25
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   BINDING         176
FT                   /ligand="Mn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29035"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01470"
FT   BINDING         241
FT                   /ligand="Mn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29035"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01470"
FT   BINDING         256
FT                   /ligand="Mn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29035"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01470"
SQ   SEQUENCE   347 AA;  39595 MW;  63CB49F6D9C78842 CRC64;
     MNIENEVHIE NASESKREPK PPEGLLEDDT IYITTPYGKI SLDGGRIQVK DSDGEIVASF
     PLEKVCTMNV FGSASVSTPL LKHCSDKEVV INYFTNFGKY FGSFVPSRNT IALVRRHQAG
     ITKEKSLAIC REIIHAKLQN SCVFLARKRV EVPSLLKELR DRSLHAVSVD SLRGIEGEAA
     SIYFPMLSSS LPDEWRSDKR TRRPPRDELN ALLSLTYTMV NTEVISALRQ YNLDPFIGVM
     HVDRHGKPAL ALDLLEEFRP VFCDAFVARL INKRMITKDD FTQGSRLNDT AFKKYLGFYH
     DFMEESLKHP RFKYSVSRKK AIQIQAIIFR KAICGELKGY YPFIYAR