ID   RSMB_SERP5              Reviewed;         429 AA.
AC   A8GKG7;
DT   03-MAR-2009, integrated into UniProtKB/Swiss-Prot.
DT   13-NOV-2007, sequence version 1.
DT   03-AUG-2022, entry version 85.
DE   RecName: Full=Ribosomal RNA small subunit methyltransferase B {ECO:0000255|HAMAP-Rule:MF_01856};
DE            EC=2.1.1.176 {ECO:0000255|HAMAP-Rule:MF_01856};
DE   AltName: Full=16S rRNA m5C967 methyltransferase {ECO:0000255|HAMAP-Rule:MF_01856};
DE   AltName: Full=rRNA (cytosine-C(5)-)-methyltransferase RsmB {ECO:0000255|HAMAP-Rule:MF_01856};
GN   Name=rsmB {ECO:0000255|HAMAP-Rule:MF_01856};
GN   Synonyms=sun {ECO:0000255|HAMAP-Rule:MF_01856};
GN   OrderedLocusNames=Spro_4513;
OS   Serratia proteamaculans (strain 568).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Yersiniaceae; Serratia.
OX   NCBI_TaxID=399741;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=568;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Glavina del Rio T., Dalin E.,
RA   Tice H., Pitluck S., Chain P., Malfatti S., Shin M., Vergez L., Schmutz J.,
RA   Larimer F., Land M., Hauser L., Kyrpides N., Kim E., Taghavi S., Newman L.,
RA   Vangronsveld J., van der Lelie D., Richardson P.;
RT   "Complete sequence of chromosome of Serratia proteamaculans 568.";
RL   Submitted (SEP-2007) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Specifically methylates the cytosine at position 967 (m5C967)
CC       of 16S rRNA. {ECO:0000255|HAMAP-Rule:MF_01856}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=cytidine(967) in 16S rRNA + S-adenosyl-L-methionine = 5-
CC         methylcytidine(967) in 16S rRNA + H(+) + S-adenosyl-L-homocysteine;
CC         Xref=Rhea:RHEA:42748, Rhea:RHEA-COMP:10219, Rhea:RHEA-COMP:10220,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:57856, ChEBI:CHEBI:59789,
CC         ChEBI:CHEBI:74483, ChEBI:CHEBI:82748; EC=2.1.1.176;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01856};
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_01856}.
CC   -!- SIMILARITY: Belongs to the class I-like SAM-binding methyltransferase
CC       superfamily. RsmB/NOP family. {ECO:0000255|HAMAP-Rule:MF_01856}.
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DR   EMBL; CP000826; ABV43607.1; -; Genomic_DNA.
DR   RefSeq; WP_012147207.1; NC_009832.1.
DR   AlphaFoldDB; A8GKG7; -.
DR   SMR; A8GKG7; -.
DR   STRING; 399741.Spro_4513; -.
DR   EnsemblBacteria; ABV43607; ABV43607; Spro_4513.
DR   KEGG; spe:Spro_4513; -.
DR   eggNOG; COG0144; Bacteria.
DR   eggNOG; COG0781; Bacteria.
DR   HOGENOM; CLU_005316_0_4_6; -.
DR   OMA; RVNRQHH; -.
DR   OrthoDB; 1064993at2; -.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0003723; F:RNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0016434; F:rRNA (cytosine) methyltransferase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006355; P:regulation of transcription, DNA-templated; IEA:InterPro.
DR   Gene3D; 1.10.940.10; -; 1.
DR   Gene3D; 3.40.50.150; -; 1.
DR   HAMAP; MF_01856; 16SrRNA_methyltr_B; 1.
DR   InterPro; IPR018314; Fmu/NOL1/Nop2p_CS.
DR   InterPro; IPR001678; MeTrfase_RsmB/NOP2.
DR   InterPro; IPR035926; NusB-like_sf.
DR   InterPro; IPR006027; NusB_RsmB_TIM44.
DR   InterPro; IPR023267; RCMT.
DR   InterPro; IPR004573; rRNA_ssu_MeTfrase_B.
DR   InterPro; IPR023541; rRNA_ssu_MeTfrase_B_ent.
DR   InterPro; IPR029063; SAM-dependent_MTases_sf.
DR   PANTHER; PTHR22807; PTHR22807; 1.
DR   Pfam; PF01189; Methyltr_RsmB-F; 1.
DR   Pfam; PF01029; NusB; 1.
DR   PRINTS; PR02008; RCMTFAMILY.
DR   SUPFAM; SSF48013; SSF48013; 1.
DR   SUPFAM; SSF53335; SSF53335; 1.
DR   TIGRFAMs; TIGR00563; rsmB; 1.
DR   PROSITE; PS01153; NOL1_NOP2_SUN; 1.
DR   PROSITE; PS51686; SAM_MT_RSMB_NOP; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Methyltransferase; RNA-binding; rRNA processing;
KW   S-adenosyl-L-methionine; Transferase.
FT   CHAIN           1..429
FT                   /note="Ribosomal RNA small subunit methyltransferase B"
FT                   /id="PRO_0000366175"
FT   ACT_SITE        375
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01856"
FT   BINDING         254..260
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01856"
FT   BINDING         277
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01856"
FT   BINDING         303
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01856"
FT   BINDING         322
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01856"
SQ   SEQUENCE   429 AA;  48279 MW;  9594F2D5FA8D9B0A CRC64;
     MKNNYNLRSI AAIAIGQVLD QGQSLSTVLP SLQKTISDKD RALLQELCFG TLRVLPQLEW
     CIQQLMAKPM TGKQRTLHYL LMVGLYQLLY TRIPAHAVLA ETVEGAVALK RPQLKGLING
     VLRQFQRQQE ELLQRAANND SRYLHPSWLL KRIQQAYPAQ WEQIIDANNQ KPPMWLRVNR
     LHHTREDYLQ LMEQAGIAAE PHAEYRDAVR LLAPCAVTDL PGFADGWVTV QDASAQGCVD
     LLDPQDGEQI LDLCAAPGGK TTHILEAAPK AHVMAVDIDE QRLKRVKENL QRLRLHAEVK
     QGDGRTPQQW CGDKQFDRIL LDAPCSATGV IRRHPDIKWL RRDSDIAELA ALQAEIIEAI
     WPHLKSGGVM VYATCSILPA ENAEQVSAFL QRHADARLVE TGNQQQPGRQ NLPHPEDGDG
     FFYAKLIKM