ID   RSMA_HALWD              Reviewed;         296 AA.
AC   Q18GB5;
DT   31-OCT-2006, integrated into UniProtKB/Swiss-Prot.
DT   25-JUL-2006, sequence version 1.
DT   03-AUG-2022, entry version 94.
DE   RecName: Full=Probable ribosomal RNA small subunit methyltransferase A {ECO:0000255|HAMAP-Rule:MF_00607};
DE            EC=2.1.1.- {ECO:0000255|HAMAP-Rule:MF_00607};
DE   AltName: Full=16S rRNA dimethyladenosine transferase {ECO:0000255|HAMAP-Rule:MF_00607};
DE   AltName: Full=16S rRNA dimethylase {ECO:0000255|HAMAP-Rule:MF_00607};
DE   AltName: Full=S-adenosylmethionine-6-N',N'-adenosyl(rRNA) dimethyltransferase {ECO:0000255|HAMAP-Rule:MF_00607};
GN   Name=rsmA {ECO:0000255|HAMAP-Rule:MF_00607};
GN   Synonyms=ksgA {ECO:0000255|HAMAP-Rule:MF_00607};
GN   OrderedLocusNames=HQ_2878A;
OS   Haloquadratum walsbyi (strain DSM 16790 / HBSQ001).
OC   Archaea; Euryarchaeota; Stenosarchaea group; Halobacteria; Haloferacales;
OC   Haloferacaceae; Haloquadratum.
OX   NCBI_TaxID=362976;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 16790 / HBSQ001;
RX   PubMed=16820047; DOI=10.1186/1471-2164-7-169;
RA   Bolhuis H., Palm P., Wende A., Falb M., Rampp M., Rodriguez-Valera F.,
RA   Pfeiffer F., Oesterhelt D.;
RT   "The genome of the square archaeon Haloquadratum walsbyi: life at the
RT   limits of water activity.";
RL   BMC Genomics 7:169-169(2006).
CC   -!- FUNCTION: Specifically dimethylates two adjacent adenosines in the loop
CC       of a conserved hairpin near the 3'-end of 16S rRNA in the 30S particle.
CC       May play a critical role in biogenesis of 30S subunits.
CC       {ECO:0000255|HAMAP-Rule:MF_00607}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00607}.
CC   -!- SIMILARITY: Belongs to the class I-like SAM-binding methyltransferase
CC       superfamily. rRNA adenine N(6)-methyltransferase family. RsmA
CC       subfamily. {ECO:0000255|HAMAP-Rule:MF_00607}.
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DR   EMBL; AM180088; CAJ52985.1; -; Genomic_DNA.
DR   RefSeq; WP_011572096.1; NC_008212.1.
DR   AlphaFoldDB; Q18GB5; -.
DR   SMR; Q18GB5; -.
DR   STRING; 362976.HQ_2878A; -.
DR   PRIDE; Q18GB5; -.
DR   EnsemblBacteria; CAJ52985; CAJ52985; HQ_2878A.
DR   GeneID; 4194176; -.
DR   KEGG; hwa:HQ_2878A; -.
DR   eggNOG; arCOG04131; Archaea.
DR   HOGENOM; CLU_041220_0_2_2; -.
DR   OMA; KEEEPYF; -.
DR   Proteomes; UP000001975; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0003723; F:RNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0000179; F:rRNA (adenine-N6,N6-)-dimethyltransferase activity; IEA:InterPro.
DR   Gene3D; 1.10.8.100; -; 1.
DR   Gene3D; 3.40.50.150; -; 1.
DR   HAMAP; MF_00607; 16SrRNA_methyltr_A; 1.
DR   InterPro; IPR001737; KsgA/Erm.
DR   InterPro; IPR023165; rRNA_Ade_diMease-like_C.
DR   InterPro; IPR020596; rRNA_Ade_Mease_Trfase_CS.
DR   InterPro; IPR020598; rRNA_Ade_methylase_Trfase_N.
DR   InterPro; IPR011530; rRNA_adenine_dimethylase.
DR   InterPro; IPR029063; SAM-dependent_MTases_sf.
DR   PANTHER; PTHR11727; PTHR11727; 1.
DR   Pfam; PF00398; RrnaAD; 1.
DR   SMART; SM00650; rADc; 1.
DR   SUPFAM; SSF53335; SSF53335; 1.
DR   TIGRFAMs; TIGR00755; ksgA; 1.
DR   PROSITE; PS01131; RRNA_A_DIMETH; 1.
DR   PROSITE; PS51689; SAM_RNA_A_N6_MT; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Methyltransferase; Reference proteome; RNA-binding;
KW   rRNA processing; S-adenosyl-L-methionine; Transferase.
FT   CHAIN           1..296
FT                   /note="Probable ribosomal RNA small subunit
FT                   methyltransferase A"
FT                   /id="PRO_0000257378"
FT   REGION          1..25
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        1..15
FT                   /note="Polar residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   BINDING         44
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00607"
FT   BINDING         46
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00607"
FT   BINDING         72
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00607"
FT   BINDING         93
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00607"
FT   BINDING         121
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00607"
FT   BINDING         136
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00607"
SQ   SEQUENCE   296 AA;  32134 MW;  B1347D94AC3E42A6 CRC64;
     MTDATSGSDP DSTTPVDLTG EDFRDPDALR RRAGVSGDPN FDQHFLIDDR VLDRIPTYLL
     DSTDTTHILE IGAGTGALTD RLLAVGDTVT VIERDATLAA FLREEFAVMI DDGRLNIIEG
     DALEVTLPAF TTCISNLPYG ISSEILFELL PADCPLIVMV QREFGERMAA DPGTDAYGRL
     SVSAQHYATV EVVETVPPTA FAPEPAVDSA LIRAEPRDPD YTVTDETFFL RFVKAVFTQR
     RKTVRNAIRN TAHISMLDTP DAVVNAADEA LLSQRAGDLT PSEFAELATI AAEKGK