ID M1XKL9_NATM8 Unreviewed; 138 AA.
AC M1XKL9;
DT 01-MAY-2013, integrated into UniProtKB/TrEMBL.
DT 01-MAY-2013, sequence version 1.
DT 27-MAR-2024, entry version 52.
DE RecName: Full=6,7-dimethyl-8-ribityllumazine synthase {ECO:0000256|ARBA:ARBA00012664, ECO:0000256|HAMAP-Rule:MF_00178};
DE Short=DMRL synthase {ECO:0000256|HAMAP-Rule:MF_00178};
DE Short=LS {ECO:0000256|HAMAP-Rule:MF_00178};
DE Short=Lumazine synthase {ECO:0000256|HAMAP-Rule:MF_00178};
DE EC=2.5.1.78 {ECO:0000256|ARBA:ARBA00012664, ECO:0000256|HAMAP-Rule:MF_00178};
GN Name=ribH {ECO:0000256|HAMAP-Rule:MF_00178,
GN ECO:0000313|EMBL:CCQ36137.1};
GN OrderedLocusNames=Nmlp_1952 {ECO:0000313|EMBL:CCQ36137.1};
OS Natronomonas moolapensis (strain DSM 18674 / CECT 7526 / JCM 14361 /
OS 8.8.11).
OC Archaea; Euryarchaeota; Stenosarchaea group; Halobacteria; Halobacteriales;
OC Haloarculaceae; Natronomonas.
OX NCBI_TaxID=268739 {ECO:0000313|EMBL:CCQ36137.1, ECO:0000313|Proteomes:UP000011867};
RN [1] {ECO:0000313|EMBL:CCQ36137.1, ECO:0000313|Proteomes:UP000011867}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 18674 / JCM 14361 / 8.8.11
RC {ECO:0000313|Proteomes:UP000011867};
RX PubMed=23516216; DOI=10.1128/genomeA.00095-13;
RA Dyall-Smith M.L., Pfeiffer F., Oberwinkler T., Klee K., Rampp M., Palm P.,
RA Gross K., Schuster S.C., Oesterhelt D.;
RT "Genome of the haloarchaeon Natronomonas moolapensis, a neutrophilic member
RT of a previously haloalkaliphilic genus.";
RL Genome Announc. 1:e0009513-e0009513(2013).
CC -!- FUNCTION: Catalyzes the formation of 6,7-dimethyl-8-ribityllumazine by
CC condensation of 5-amino-6-(D-ribitylamino)uracil with 3,4-dihydroxy-2-
CC butanone 4-phosphate. This is the penultimate step in the biosynthesis
CC of riboflavin. {ECO:0000256|HAMAP-Rule:MF_00178}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=(2S)-2-hydroxy-3-oxobutyl phosphate + 5-amino-6-(D-
CC ribitylamino)uracil = 6,7-dimethyl-8-(1-D-ribityl)lumazine + H(+) + 2
CC H2O + phosphate; Xref=Rhea:RHEA:26152, ChEBI:CHEBI:15377,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:15934, ChEBI:CHEBI:43474,
CC ChEBI:CHEBI:58201, ChEBI:CHEBI:58830; EC=2.5.1.78;
CC Evidence={ECO:0000256|ARBA:ARBA00001697, ECO:0000256|HAMAP-
CC Rule:MF_00178};
CC -!- PATHWAY: Cofactor biosynthesis; riboflavin biosynthesis; riboflavin
CC from 2-hydroxy-3-oxobutyl phosphate and 5-amino-6-(D-
CC ribitylamino)uracil: step 1/2. {ECO:0000256|ARBA:ARBA00004917,
CC ECO:0000256|HAMAP-Rule:MF_00178}.
CC -!- SIMILARITY: Belongs to the DMRL synthase family.
CC {ECO:0000256|ARBA:ARBA00007424, ECO:0000256|HAMAP-Rule:MF_00178}.
CC -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC feature annotation. {ECO:0000256|HAMAP-Rule:MF_00178}.
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DR EMBL; HF582854; CCQ36137.1; -; Genomic_DNA.
DR RefSeq; WP_015408955.1; NC_020388.1.
DR AlphaFoldDB; M1XKL9; -.
DR STRING; 268739.Nmlp_1952; -.
DR GeneID; 14652294; -.
DR KEGG; nmo:Nmlp_1952; -.
DR eggNOG; arCOG01323; Archaea.
DR HOGENOM; CLU_089358_3_0_2; -.
DR OrthoDB; 7610at2157; -.
DR UniPathway; UPA00275; UER00404.
DR Proteomes; UP000011867; Chromosome.
DR GO; GO:0009349; C:riboflavin synthase complex; IEA:InterPro.
DR GO; GO:0000906; F:6,7-dimethyl-8-ribityllumazine synthase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0009231; P:riboflavin biosynthetic process; IEA:UniProtKB-UniRule.
DR Gene3D; 3.40.50.960; Lumazine/riboflavin synthase; 1.
DR HAMAP; MF_00178; Lumazine_synth; 1.
DR InterPro; IPR034964; LS.
DR InterPro; IPR002180; LS/RS.
DR InterPro; IPR036467; LS/RS_sf.
DR NCBIfam; TIGR00114; lumazine-synth; 1.
DR PANTHER; PTHR21058:SF0; 6,7-DIMETHYL-8-RIBITYLLUMAZINE SYNTHASE; 1.
DR PANTHER; PTHR21058; 6,7-DIMETHYL-8-RIBITYLLUMAZINE SYNTHASE DMRL SYNTHASE LUMAZINE SYNTHASE; 1.
DR Pfam; PF00885; DMRL_synthase; 1.
DR SUPFAM; SSF52121; Lumazine synthase; 1.
PE 3: Inferred from homology;
KW Reference proteome {ECO:0000313|Proteomes:UP000011867};
KW Riboflavin biosynthesis {ECO:0000256|ARBA:ARBA00022619, ECO:0000256|HAMAP-
KW Rule:MF_00178};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW Rule:MF_00178}.
FT ACT_SITE 77
FT /note="Proton donor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
FT BINDING 45..47
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
FT BINDING 69..71
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
FT BINDING 74..75
FT /ligand="(2S)-2-hydroxy-3-oxobutyl phosphate"
FT /ligand_id="ChEBI:CHEBI:58830"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
FT BINDING 102
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
FT BINDING 117
FT /ligand="(2S)-2-hydroxy-3-oxobutyl phosphate"
FT /ligand_id="ChEBI:CHEBI:58830"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
SQ SEQUENCE 138 AA; 14527 MW; 2DF5F7E49B0809EF CRC64;
MVALGLVVAQ FNKERPVTHE MESRARDAAD EAGAEILETI EVPGSYDTPL AADRLARRPE
IDAVAVLGAI VTGDTDHDRV IADSAAGRLT DVSLDRDTPV TLGITGPGMS QAEAEERTHH
GASAVRSAIS LAEELDTL
//