ID   RSMI_MYCGE              Reviewed;         277 AA.
AC   P47302;
DT   01-FEB-1996, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1996, sequence version 1.
DT   02-SEP-2026, entry version 128.
DE   RecName: Full=Ribosomal RNA small subunit methyltransferase I {ECO:0000255|HAMAP-Rule:MF_01877};
DE            EC=2.1.1.198 {ECO:0000255|HAMAP-Rule:MF_01877};
DE   AltName: Full=16S rRNA 2'-O-ribose C1402 methyltransferase {ECO:0000255|HAMAP-Rule:MF_01877};
DE   AltName: Full=rRNA (cytidine-2'-O-)-methyltransferase RsmI {ECO:0000255|HAMAP-Rule:MF_01877};
GN   Name=rsmI {ECO:0000255|HAMAP-Rule:MF_01877}; OrderedLocusNames=MG056;
OS   Mycoplasmoides genitalium (strain ATCC 33530 / DSM 19775 / NCTC 10195 /
OS   G37) (Mycoplasma genitalium).
OC   Bacteria; Bacillati; Mycoplasmatota; Mycoplasmoidales; Mycoplasmoidaceae;
OC   Mycoplasmoides.
OX   NCBI_TaxID=243273;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 33530 / DSM 19775 / NCTC 10195 / G37;
RX   PubMed=7569993; DOI=10.1126/science.270.5235.397;
RA   Fraser C.M., Gocayne J.D., White O., Adams M.D., Clayton R.A.,
RA   Fleischmann R.D., Bult C.J., Kerlavage A.R., Sutton G.G., Kelley J.M.,
RA   Fritchman J.L., Weidman J.F., Small K.V., Sandusky M., Fuhrmann J.L.,
RA   Nguyen D.T., Utterback T.R., Saudek D.M., Phillips C.A., Merrick J.M.,
RA   Tomb J.-F., Dougherty B.A., Bott K.F., Hu P.-C., Lucier T.S.,
RA   Peterson S.N., Smith H.O., Hutchison C.A. III, Venter J.C.;
RT   "The minimal gene complement of Mycoplasma genitalium.";
RL   Science 270:397-403(1995).
CC   -!- FUNCTION: Catalyzes the 2'-O-methylation of the ribose of cytidine 1402
CC       (C1402) in 16S rRNA. {ECO:0000255|HAMAP-Rule:MF_01877}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=cytidine(1402) in 16S rRNA + S-adenosyl-L-methionine = 2'-O-
CC         methylcytidine(1402) in 16S rRNA + S-adenosyl-L-homocysteine + H(+);
CC         Xref=Rhea:RHEA:42924, Rhea:RHEA-COMP:10285, Rhea:RHEA-COMP:10286,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:57856, ChEBI:CHEBI:59789,
CC         ChEBI:CHEBI:74495, ChEBI:CHEBI:82748; EC=2.1.1.198;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01877};
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_01877}.
CC   -!- SIMILARITY: Belongs to the methyltransferase superfamily. RsmI family.
CC       {ECO:0000255|HAMAP-Rule:MF_01877}.
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DR   EMBL; L43967; AAC71273.1; -; Genomic_DNA.
DR   PIR; B64206; B64206.
DR   RefSeq; WP_009885721.1; NC_000908.2.
DR   AlphaFoldDB; P47302; -.
DR   SMR; P47302; -.
DR   FunCoup; P47302; 129.
DR   STRING; 243273.MG_056; -.
DR   GeneID; 99646867; -.
DR   KEGG; mge:MG_056; -.
DR   eggNOG; COG0313; Bacteria.
DR   HOGENOM; CLU_044779_4_0_14; -.
DR   InParanoid; P47302; -.
DR   OrthoDB; 9809084at2; -.
DR   BioCyc; MGEN243273:G1GJ2-59-MONOMER; -.
DR   Proteomes; UP000000807; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0070677; F:rRNA (cytosine-2'-O-ribose)-methyltransferase activity; IBA:GO_Central.
DR   GO; GO:0031167; P:rRNA methylation; IEA:UniProtKB-UniRule.
DR   GO; GO:0006364; P:rRNA processing; IBA:GO_Central.
DR   CDD; cd11648; RsmI; 1.
DR   FunFam; 3.40.1010.10:FF:000007; Ribosomal RNA small subunit methyltransferase I; 1.
DR   Gene3D; 3.40.1010.10; Cobalt-precorrin-4 Transmethylase, Domain 1; 1.
DR   Gene3D; 3.30.950.10; Methyltransferase, Cobalt-precorrin-4 Transmethylase, Domain 2; 1.
DR   HAMAP; MF_01877; 16SrRNA_methyltr_I; 1.
DR   InterPro; IPR000878; 4pyrrol_Mease.
DR   InterPro; IPR035996; 4pyrrol_Methylase_sf.
DR   InterPro; IPR014777; 4pyrrole_Mease_sub1.
DR   InterPro; IPR014776; 4pyrrole_Mease_sub2.
DR   InterPro; IPR008189; rRNA_ssu_MeTfrase_I.
DR   InterPro; IPR018063; SAM_MeTrfase_RsmI_CS.
DR   NCBIfam; TIGR00096; 16S rRNA (cytidine(1402)-2'-O)-methyltransferase; 1.
DR   PANTHER; PTHR46111; RIBOSOMAL RNA SMALL SUBUNIT METHYLTRANSFERASE I; 1.
DR   PANTHER; PTHR46111:SF1; RIBOSOMAL RNA SMALL SUBUNIT METHYLTRANSFERASE I; 1.
DR   Pfam; PF00590; TP_methylase; 1.
DR   PIRSF; PIRSF005917; MTase_YraL; 1.
DR   SUPFAM; SSF53790; Tetrapyrrole methylase; 1.
DR   PROSITE; PS01296; RSMI; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Methyltransferase; Reference proteome; rRNA processing;
KW   S-adenosyl-L-methionine; Transferase.
FT   CHAIN           1..277
FT                   /note="Ribosomal RNA small subunit methyltransferase I"
FT                   /id="PRO_0000211943"
SQ   SEQUENCE   277 AA;  31895 MW;  CD25DD3930364B5C CRC64;
     MKTLKVVATP IGNIQEISER AKKALQDCEV LFCEDSRVTR KMLDLLNIDC KQKKFVINNS
     FKEKQNLTFA EEFITNFKCC LVSDAGYPSL SDPGNEMINW IISKNKEIRI EVINGPSALM
     CGLITSGFKT TPLLFLGFLS HKQNQLKNYL STYQNQKSTI VFFEAVHRLE NTLETVKNVF
     KNNDVFIGRE LTKLHESHYW FNTSENTLPD ITLKGEFVIV IDNQNINHQT LSSNQYLVYE
     IKKLMDIGVK LKDACNYLAK KMHLKSSMLY TLFHESI
//