ID   PIMT_IGNH4              Reviewed;         211 AA.
AC   A8AAV7;
DT   14-OCT-2008, integrated into UniProtKB/Swiss-Prot.
DT   23-OCT-2007, sequence version 1.
DT   03-AUG-2022, entry version 74.
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=Igni_0877;
OS   Ignicoccus hospitalis (strain KIN4/I / DSM 18386 / JCM 14125).
OC   Archaea; Crenarchaeota; Thermoprotei; Desulfurococcales;
OC   Desulfurococcaceae; Ignicoccus.
OX   NCBI_TaxID=453591;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=KIN4/I / DSM 18386 / JCM 14125;
RX   PubMed=19000309; DOI=10.1186/gb-2008-9-11-r158;
RA   Podar M., Anderson I., Makarova K.S., Elkins J.G., Ivanova N., Wall M.A.,
RA   Lykidis A., Mavromatis K., Sun H., Hudson M.E., Chen W., Deciu C.,
RA   Hutchison D., Eads J.R., Anderson A., Fernandes F., Szeto E., Lapidus A.,
RA   Kyrpides N.C., Saier M.H. Jr., Richardson P.M., Rachel R., Huber H.,
RA   Eisen J.A., Koonin E.V., Keller M., Stetter K.O.;
RT   "A genomic analysis of the archaeal system Ignicoccus hospitalis-
RT   Nanoarchaeum equitans.";
RL   Genome Biol. 9:R158.1-R158.18(2008).
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}.
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DR   EMBL; CP000816; ABU82059.1; -; Genomic_DNA.
DR   RefSeq; WP_012123023.1; NC_009776.1.
DR   AlphaFoldDB; A8AAV7; -.
DR   SMR; A8AAV7; -.
DR   STRING; 453591.Igni_0877; -.
DR   EnsemblBacteria; ABU82059; ABU82059; Igni_0877.
DR   GeneID; 5562192; -.
DR   KEGG; iho:Igni_0877; -.
DR   eggNOG; arCOG00976; Archaea.
DR   HOGENOM; CLU_055432_2_0_2; -.
DR   OMA; TISAIHM; -.
DR   OrthoDB; 88476at2157; -.
DR   PhylomeDB; A8AAV7; -.
DR   Proteomes; UP000000262; 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..211
FT                   /note="Protein-L-isoaspartate O-methyltransferase"
FT                   /id="PRO_0000351966"
FT   ACT_SITE        59
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00090"
SQ   SEQUENCE   211 AA;  23388 MW;  92B0B97655D1EFDE CRC64;
     MEEKKRELIR NLIAEGYIKR KEVAEAMMKV PRELFVPEEL RHMAYEDTPL PIGAGQTISA
     PHMVAYMVEA AELRRGDKVL EVGTGSGYHA AVMAELVGPE GHVYTIERIP ELAERARERL
     KALGYNNVTV LVGDGSKGYP PAAPYDKIIV TAAAKRVPEA LLKQLKVGGI MVIPVEEEPG
     YQVLYKIIKT PEGYVIKKLL PVAFVPLIEE E