ID   PIMT_METBU              Reviewed;         203 AA.
AC   Q12UV0;
DT   14-OCT-2008, integrated into UniProtKB/Swiss-Prot.
DT   22-AUG-2006, sequence version 1.
DT   03-AUG-2022, entry version 86.
DE   RecName: Full=Protein-L-isoaspartate O-methyltransferase {ECO:0000255|HAMAP-Rule:MF_00090};
DE            EC=2.1.1.77 {ECO:0000255|HAMAP-Rule:MF_00090};
DE   AltName: Full=L-isoaspartyl protein carboxyl methyltransferase {ECO:0000255|HAMAP-Rule:MF_00090};
DE   AltName: Full=Protein L-isoaspartyl methyltransferase {ECO:0000255|HAMAP-Rule:MF_00090};
DE   AltName: Full=Protein-beta-aspartate methyltransferase {ECO:0000255|HAMAP-Rule:MF_00090};
DE            Short=PIMT {ECO:0000255|HAMAP-Rule:MF_00090};
GN   Name=pcm {ECO:0000255|HAMAP-Rule:MF_00090}; OrderedLocusNames=Mbur_1894;
OS   Methanococcoides burtonii (strain DSM 6242 / NBRC 107633 / OCM 468 /
OS   ACE-M).
OC   Archaea; Euryarchaeota; Stenosarchaea group; Methanomicrobia;
OC   Methanosarcinales; Methanosarcinaceae; Methanococcoides.
OX   NCBI_TaxID=259564;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 6242 / NBRC 107633 / OCM 468 / ACE-M;
RX   PubMed=19404327; DOI=10.1038/ismej.2009.45;
RA   Allen M.A., Lauro F.M., Williams T.J., Burg D., Siddiqui K.S.,
RA   De Francisci D., Chong K.W., Pilak O., Chew H.H., De Maere M.Z., Ting L.,
RA   Katrib M., Ng C., Sowers K.R., Galperin M.Y., Anderson I.J., Ivanova N.,
RA   Dalin E., Martinez M., Lapidus A., Hauser L., Land M., Thomas T.,
RA   Cavicchioli R.;
RT   "The genome sequence of the psychrophilic archaeon, Methanococcoides
RT   burtonii: the role of genome evolution in cold adaptation.";
RL   ISME J. 3:1012-1035(2009).
CC   -!- FUNCTION: Catalyzes the methyl esterification of L-isoaspartyl residues
CC       in peptides and proteins that result from spontaneous decomposition of
CC       normal L-aspartyl and L-asparaginyl residues. It plays a role in the
CC       repair and/or degradation of damaged proteins. {ECO:0000255|HAMAP-
CC       Rule:MF_00090}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=[protein]-L-isoaspartate + S-adenosyl-L-methionine =
CC         [protein]-L-isoaspartate alpha-methyl ester + S-adenosyl-L-
CC         homocysteine; Xref=Rhea:RHEA:12705, Rhea:RHEA-COMP:12143, Rhea:RHEA-
CC         COMP:12144, ChEBI:CHEBI:57856, ChEBI:CHEBI:59789, ChEBI:CHEBI:90596,
CC         ChEBI:CHEBI:90598; EC=2.1.1.77; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00090};
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00090}.
CC   -!- SIMILARITY: Belongs to the methyltransferase superfamily. L-
CC       isoaspartyl/D-aspartyl protein methyltransferase family.
CC       {ECO:0000255|HAMAP-Rule:MF_00090}.
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; CP000300; ABE52776.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q12UV0; -.
DR   SMR; Q12UV0; -.
DR   STRING; 259564.Mbur_1894; -.
DR   EnsemblBacteria; ABE52776; ABE52776; Mbur_1894.
DR   KEGG; mbu:Mbur_1894; -.
DR   HOGENOM; CLU_055432_2_0_2; -.
DR   OMA; TISAIHM; -.
DR   Proteomes; UP000001979; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0004719; F:protein-L-isoaspartate (D-aspartate) O-methyltransferase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0030091; P:protein repair; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.40.50.150; -; 1.
DR   HAMAP; MF_00090; PIMT; 1.
DR   InterPro; IPR000682; PCMT.
DR   InterPro; IPR029063; SAM-dependent_MTases_sf.
DR   PANTHER; PTHR11579; PTHR11579; 1.
DR   SUPFAM; SSF53335; SSF53335; 1.
DR   TIGRFAMs; TIGR00080; pimt; 1.
DR   PROSITE; PS01279; PCMT; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Methyltransferase; Reference proteome; S-adenosyl-L-methionine;
KW   Transferase.
FT   CHAIN           1..203
FT                   /note="Protein-L-isoaspartate O-methyltransferase"
FT                   /id="PRO_0000351968"
FT   ACT_SITE        50
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00090"
SQ   SEQUENCE   203 AA;  22065 MW;  54856B1F15A78C3E CRC64;
     MIRALKANGT DQRVLNAMKK VPRHLFLPED MQSFAYADTP LPIGYDQTIS APHMVAIMCD
     LLKITEGMTI LEIGSGSGYN AAVMAELAGE NGKVYTVERI PELVDLARNN LERAGYSNVT
     VVHDDGSCGL PEHAPYDRIA VTSVAPEVPP PLREQLSKNG IMVIPVGTQY QTLVVVKKDS
     KGNITHKAMG EVIFVPLIGK YGF