ID A0A3G9J322_9ACTN Unreviewed; 293 AA.
AC A0A3G9J322;
DT 13-FEB-2019, integrated into UniProtKB/TrEMBL.
DT 13-FEB-2019, sequence version 1.
DT 08-OCT-2025, entry version 22.
DE RecName: Full=Mycothiol S-conjugate amidase {ECO:0000256|HAMAP-Rule:MF_01482};
DE EC=3.5.1.115 {ECO:0000256|HAMAP-Rule:MF_01482};
GN Name=mca {ECO:0000256|HAMAP-Rule:MF_01482,
GN ECO:0000313|EMBL:BBH18008.1};
GN ORFNames=Back2_22950 {ECO:0000313|EMBL:BBH18008.1};
OS Nocardioides baekrokdamisoli.
OC Bacteria; Bacillati; Actinomycetota; Actinomycetes; Propionibacteriales;
OC Nocardioidaceae; Nocardioides.
OX NCBI_TaxID=1804624 {ECO:0000313|EMBL:BBH18008.1, ECO:0000313|Proteomes:UP000271573};
RN [1] {ECO:0000313|EMBL:BBH18008.1, ECO:0000313|Proteomes:UP000271573}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=KCTC 39748 {ECO:0000313|EMBL:BBH18008.1,
RC ECO:0000313|Proteomes:UP000271573};
RA Kang S.W., Lee K.C., Kim K.K., Kim J.S., Kim D.S., Ko S.H., Yang S.H.,
RA Shin Y.K., Lee J.S.;
RT "Complete genome sequence of Nocardioides baekrokdamisoli strain KCTC
RT 39748.";
RL Submitted (NOV-2018) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: A mycothiol (MSH, N-acetylcysteinyl-glucosaminyl-inositol) S-
CC conjugate amidase, it recycles conjugated MSH to the N-acetyl cysteine
CC conjugate (AcCys S-conjugate, a mercapturic acid) and the MSH
CC precursor. Involved in MSH-dependent detoxification of a number of
CC alkylating agents and antibiotics. {ECO:0000256|HAMAP-Rule:MF_01482}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=mycothiol S-conjugate + H2O = an N-acetyl-L-cysteine-S-
CC conjugate + 1D-myo-inositol 2-amino-2-deoxy-alpha-D-glucopyranoside;
CC Xref=Rhea:RHEA:36543, ChEBI:CHEBI:15377, ChEBI:CHEBI:58718,
CC ChEBI:CHEBI:58886, ChEBI:CHEBI:59633; EC=3.5.1.115;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01482};
CC -!- COFACTOR:
CC Name=Zn(2+); Xref=ChEBI:CHEBI:29105;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01482};
CC Note=Binds 1 zinc ion per subunit. {ECO:0000256|HAMAP-Rule:MF_01482};
CC -!- SUBUNIT: Monomer. {ECO:0000256|HAMAP-Rule:MF_01482}.
CC -!- SIMILARITY: Belongs to the MshB deacetylase family. Mca subfamily.
CC {ECO:0000256|HAMAP-Rule:MF_01482}.
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DR EMBL; AP019307; BBH18008.1; -; Genomic_DNA.
DR RefSeq; WP_125569382.1; NZ_AP019307.1.
DR AlphaFoldDB; A0A3G9J322; -.
DR KEGG; nbe:Back2_22950; -.
DR OrthoDB; 158614at2; -.
DR Proteomes; UP000271573; Chromosome.
DR GO; GO:0016811; F:hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in linear amides; IEA:TreeGrafter.
DR GO; GO:0008270; F:zinc ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0010126; P:mycothiol metabolic process; IEA:UniProtKB-UniRule.
DR GO; GO:0010127; P:mycothiol-dependent detoxification; IEA:UniProtKB-UniRule.
DR Gene3D; 3.40.50.10320; LmbE-like; 1.
DR HAMAP; MF_01482; Mca; 1.
DR InterPro; IPR003737; GlcNAc_PI_deacetylase-related.
DR InterPro; IPR024078; LmbE-like_dom_sf.
DR InterPro; IPR017811; Mca.
DR NCBIfam; TIGR03446; mycothiol_Mca; 1.
DR PANTHER; PTHR12993:SF11; N-ACETYLGLUCOSAMINYL-PHOSPHATIDYLINOSITOL DE-N-ACETYLASE; 1.
DR PANTHER; PTHR12993; N-ACETYLGLUCOSAMINYL-PHOSPHATIDYLINOSITOL DE-N-ACETYLASE-RELATED; 1.
DR Pfam; PF02585; PIG-L; 1.
DR SUPFAM; SSF102588; LmbE-like; 1.
PE 3: Inferred from homology;
KW Hydrolase {ECO:0000256|HAMAP-Rule:MF_01482};
KW Metal-binding {ECO:0000256|HAMAP-Rule:MF_01482};
KW Reference proteome {ECO:0000313|Proteomes:UP000271573};
KW Zinc {ECO:0000256|ARBA:ARBA00022833, ECO:0000256|HAMAP-Rule:MF_01482}.
FT BINDING 17
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01482"
FT BINDING 20
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01482"
FT BINDING 145
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01482"
SQ SEQUENCE 293 AA; 32449 MW; 62FADA3A261A768D CRC64;
MSDRPLAGLR LMHVHAHPDD ESSKGAASTA KYVAEGVDVH VATCTGGERG SILNPAMDRP
GVLEDIAAIR SAEMDRAREI LGITQDWLGF VDSGMPDDPA DLPVGSFAVV PLEQPVEALV
RLIRTFRPHV MTTYDERGGY PHPDHIRCHE VSMAAYAAAS DPTQFPDAGE PWQVLKIYYQ
FTFSRARMAA LHQAMLDRGL ESPYAEWLSH PSDPAWDARV TTRVPCADYF DVRDAALLAH
ETQIDPHGFW FAVPREVQQE VWPTEDFQLV DSKVSTSIPE DDLFAGIPYP VAD
//
