ID A0A1Y1ICH3_KLENI Unreviewed; 256 AA.
AC A0A1Y1ICH3;
DT 30-AUG-2017, integrated into UniProtKB/TrEMBL.
DT 30-AUG-2017, sequence version 1.
DT 13-SEP-2023, entry version 19.
DE RecName: Full=6,7-dimethyl-8-ribityllumazine synthase {ECO:0000256|ARBA:ARBA00012664, ECO:0000256|RuleBase:RU003795};
DE Short=DMRL synthase {ECO:0000256|RuleBase:RU003795};
DE EC=2.5.1.78 {ECO:0000256|ARBA:ARBA00012664, ECO:0000256|RuleBase:RU003795};
GN ORFNames=KFL_003100080 {ECO:0000313|EMBL:GAQ86771.1};
OS Klebsormidium nitens (Green alga) (Ulothrix nitens).
OC Eukaryota; Viridiplantae; Streptophyta; Klebsormidiophyceae;
OC Klebsormidiales; Klebsormidiaceae; Klebsormidium.
OX NCBI_TaxID=105231 {ECO:0000313|EMBL:GAQ86771.1, ECO:0000313|Proteomes:UP000054558};
RN [1] {ECO:0000313|EMBL:GAQ86771.1, ECO:0000313|Proteomes:UP000054558}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=NIES-2285 {ECO:0000313|EMBL:GAQ86771.1,
RC ECO:0000313|Proteomes:UP000054558};
RX PubMed=24865297; DOI=10.1038/ncomms4978;
RA Hori K., Maruyama F., Fujisawa T., Togashi T., Yamamoto N., Seo M.,
RA Sato S., Yamada T., Mori H., Tajima N., Moriyama T., Ikeuchi M.,
RA Watanabe M., Wada H., Kobayashi K., Saito M., Masuda T.,
RA Sasaki-Sekimoto Y., Mashiguchi K., Awai K., Shimojima M., Masuda S.,
RA Iwai M., Nobusawa T., Narise T., Kondo S., Saito H., Sato R., Murakawa M.,
RA Ihara Y., Oshima-Yamada Y., Ohtaka K., Satoh M., Sonobe K., Ishii M.,
RA Ohtani R., Kanamori-Sato M., Honoki R., Miyazaki D., Mochizuki H.,
RA Umetsu J., Higashi K., Shibata D., Kamiya Y., Sato N., Nakamura Y.,
RA Tabata S., Ida S., Kurokawa K., Ohta H.;
RT "Klebsormidium flaccidum genome reveals primary factors for plant
RT terrestrial adaptation.";
RL Nat. Commun. 5:3978-3978(2014).
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|RuleBase:RU003795}.
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,
CC ECO:0000256|RuleBase:RU003795};
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|RuleBase:RU003795}.
CC -!- SIMILARITY: Belongs to the DMRL synthase family.
CC {ECO:0000256|ARBA:ARBA00007424, ECO:0000256|RuleBase:RU003795}.
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DR EMBL; DF237259; GAQ86771.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A1Y1ICH3; -.
DR STRING; 105231.A0A1Y1ICH3; -.
DR OrthoDB; 276496at2759; -.
DR UniPathway; UPA00275; UER00404.
DR Proteomes; UP000054558; Unassembled WGS sequence.
DR GO; GO:0009349; C:riboflavin synthase complex; IEA:UniProtKB-UniRule.
DR GO; GO:0000906; F:6,7-dimethyl-8-ribityllumazine synthase activity; IBA:GO_Central.
DR GO; GO:0009231; P:riboflavin biosynthetic process; IBA:GO_Central.
DR CDD; cd09209; Lumazine_synthase-I; 1.
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:UP000054558};
KW Riboflavin biosynthesis {ECO:0000256|ARBA:ARBA00022619,
KW ECO:0000256|RuleBase:RU003795};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|RuleBase:RU003795}.
SQ SEQUENCE 256 AA; 26706 MW; C53BFA4F9CF94433 CRC64;
MEAIACTQKS LHTVFLGRLK QRCGNAEQGL SQSAPALAGN RKHHHTQALS GALRGQNAAQ
TGPAGQCHLR RQALEVPANR RGGQQSSVVC QAIRETSGKA SADGLKFAVV VARFNDFITK
LLLEGAKETF RRHGAADEDI EIVWVPGSFE LPVVATAMAK SGKFDAVLCI GAVIRGATTH
YEAVVNGATS GILGASAATG VPVIFGVLTC DTMEQAIDRA GGKAGNKGGE CAATAVEMGA
LLRDLREKKL AAPAWH
//
