ID   RSMH_CLASE              Reviewed;         318 AA.
AC   B0RI49;
DT   03-NOV-2009, integrated into UniProtKB/Swiss-Prot.
DT   08-APR-2008, sequence version 1.
DT   28-JAN-2026, entry version 101.
DE   RecName: Full=Ribosomal RNA small subunit methyltransferase H {ECO:0000255|HAMAP-Rule:MF_01007};
DE            EC=2.1.1.199 {ECO:0000255|HAMAP-Rule:MF_01007};
DE   AltName: Full=16S rRNA m(4)C1402 methyltransferase {ECO:0000255|HAMAP-Rule:MF_01007};
DE   AltName: Full=rRNA (cytosine-N(4)-)-methyltransferase RsmH {ECO:0000255|HAMAP-Rule:MF_01007};
GN   Name=rsmH {ECO:0000255|HAMAP-Rule:MF_01007}; Synonyms=mraW;
GN   OrderedLocusNames=CMS1365;
OS   Clavibacter sepedonicus (Clavibacter michiganensis subsp. sepedonicus).
OC   Bacteria; Bacillati; Actinomycetota; Actinomycetes; Micrococcales;
OC   Microbacteriaceae; Clavibacter.
OX   NCBI_TaxID=31964;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 33113 / DSM 20744 / JCM 9667 / LMG 2889 / ICMP 2535 / C-1;
RX   PubMed=18192393; DOI=10.1128/jb.01598-07;
RA   Bentley S.D., Corton C., Brown S.E., Barron A., Clark L., Doggett J.,
RA   Harris B., Ormond D., Quail M.A., May G., Francis D., Knudson D.,
RA   Parkhill J., Ishimaru C.A.;
RT   "Genome of the actinomycete plant pathogen Clavibacter michiganensis subsp.
RT   sepedonicus suggests recent niche adaptation.";
RL   J. Bacteriol. 190:2150-2160(2008).
CC   -!- FUNCTION: Specifically methylates the N4 position of cytidine in
CC       position 1402 (C1402) of 16S rRNA. {ECO:0000255|HAMAP-Rule:MF_01007}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=cytidine(1402) in 16S rRNA + S-adenosyl-L-methionine = N(4)-
CC         methylcytidine(1402) in 16S rRNA + S-adenosyl-L-homocysteine + H(+);
CC         Xref=Rhea:RHEA:42928, Rhea:RHEA-COMP:10286, Rhea:RHEA-COMP:10287,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:57856, ChEBI:CHEBI:59789,
CC         ChEBI:CHEBI:74506, ChEBI:CHEBI:82748; EC=2.1.1.199;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01007};
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_01007}.
CC   -!- SIMILARITY: Belongs to the methyltransferase superfamily. RsmH family.
CC       {ECO:0000255|HAMAP-Rule:MF_01007}.
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DR   EMBL; AM849034; CAQ01476.1; -; Genomic_DNA.
DR   RefSeq; WP_012298743.1; NC_010407.1.
DR   AlphaFoldDB; B0RI49; -.
DR   SMR; B0RI49; -.
DR   STRING; 31964.CMS1365; -.
DR   GeneID; 29472483; -.
DR   KEGG; cms:CMS1365; -.
DR   eggNOG; COG0275; Bacteria.
DR   HOGENOM; CLU_038422_0_0_11; -.
DR   OrthoDB; 9806637at2; -.
DR   Proteomes; UP000001318; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0071424; F:rRNA (cytosine-N4-)-methyltransferase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0070475; P:rRNA base methylation; IEA:UniProtKB-UniRule.
DR   Gene3D; 1.10.150.170; Putative methyltransferase TM0872, insert domain; 1.
DR   Gene3D; 3.40.50.150; Vaccinia Virus protein VP39; 1.
DR   HAMAP; MF_01007; 16SrRNA_methyltr_H; 1.
DR   InterPro; IPR002903; RsmH.
DR   InterPro; IPR023397; SAM-dep_MeTrfase_MraW_recog.
DR   InterPro; IPR029063; SAM-dependent_MTases_sf.
DR   NCBIfam; TIGR00006; 16S rRNA (cytosine(1402)-N(4))-methyltransferase RsmH; 1.
DR   PANTHER; PTHR11265:SF0; 12S RRNA N4-METHYLCYTIDINE METHYLTRANSFERASE; 1.
DR   PANTHER; PTHR11265; S-ADENOSYL-METHYLTRANSFERASE MRAW; 1.
DR   Pfam; PF01795; Methyltransf_5; 1.
DR   PIRSF; PIRSF004486; MraW; 1.
DR   SUPFAM; SSF81799; Putative methyltransferase TM0872, insert domain; 1.
DR   SUPFAM; SSF53335; S-adenosyl-L-methionine-dependent methyltransferases; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Methyltransferase; Reference proteome; rRNA processing;
KW   S-adenosyl-L-methionine; Transferase.
FT   CHAIN           1..318
FT                   /note="Ribosomal RNA small subunit methyltransferase H"
FT                   /id="PRO_0000386808"
FT   BINDING         38..40
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01007"
FT   BINDING         57
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01007"
FT   BINDING         91
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01007"
FT   BINDING         105
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01007"
FT   BINDING         112
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01007"
SQ   SEQUENCE   318 AA;  34817 MW;  D00F8C7B85682990 CRC64;
     MALDDIHTPV LLERCLELLA PALQGEGAVL VDATLGMAGH SEAFLDALPG LRLVGLDRDP
     DALAIAGERL ARFGDRVHLV HTVYDGIGRA LDGLGIGEVQ GVFFDLGVSS LQLDRVERGF
     SYSQDAPLDM RMDGTAGLTA AQVVAEYDEL ELRRIFYDYG EEKLAPRYAS RIVQAREVEP
     ITTSARLVEI IQQATPAAVQ RAGHPAKRVF QALRIEVNQE LSVLARAMPA AIDRLAVGGR
     VVVESYQSLE DRIVKRELRV RSTSTAPVGL PVELPEHRPE LKLLVRGAEL ADQHEIAQNP
     RAASVRLRAA ERARRRHA
//