NSRO_ASPN1
ID NSRO_ASPN1 Reviewed; 290 AA.
AC A0A2I1C3V7;
DT 29-SEP-2021, integrated into UniProtKB/Swiss-Prot.
DT 28-FEB-2018, sequence version 1.
DT 03-AUG-2022, entry version 11.
DE RecName: Full=Short chain dehydrogenase/reductase nsrO {ECO:0000303|PubMed:30394754};
DE Short=SDR nsrO {ECO:0000303|PubMed:30394754};
DE EC=1.1.1.- {ECO:0000305|PubMed:30394754};
DE AltName: Full=Neosartorin biosynthesis cluster protein O {ECO:0000303|PubMed:30394754};
GN Name=nsrO {ECO:0000303|PubMed:30394754}; ORFNames=P174DRAFT_421366;
OS Aspergillus novofumigatus (strain IBT 16806).
OC Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Eurotiomycetes;
OC Eurotiomycetidae; Eurotiales; Aspergillaceae; Aspergillus.
OX NCBI_TaxID=1392255;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=IBT 16806;
RX PubMed=29317534; DOI=10.1073/pnas.1715954115;
RA Kjaerboelling I., Vesth T.C., Frisvad J.C., Nybo J.L., Theobald S., Kuo A.,
RA Bowyer P., Matsuda Y., Mondo S., Lyhne E.K., Kogle M.E., Clum A.,
RA Lipzen A., Salamov A., Ngan C.Y., Daum C., Chiniquy J., Barry K.,
RA LaButti K., Haridas S., Simmons B.A., Magnuson J.K., Mortensen U.H.,
RA Larsen T.O., Grigoriev I.V., Baker S.E., Andersen M.R.;
RT "Linking secondary metabolites to gene clusters through genome sequencing
RT of six diverse Aspergillus species.";
RL Proc. Natl. Acad. Sci. U.S.A. 115:E753-E761(2018).
RN [2]
RP FUNCTION, DISRUPTION PHENOTYPE, AND PATHWAY.
RX PubMed=30394754; DOI=10.1021/acs.orglett.8b03123;
RA Matsuda Y., Gotfredsen C.H., Larsen T.O.;
RT "Genetic characterization of neosartorin biosynthesis provides insight into
RT heterodimeric natural product generation.";
RL Org. Lett. 20:7197-7200(2018).
RN [3]
RP FUNCTION, CATALYTIC ACTIVITY, AND PATHWAY.
RX PubMed=32105084; DOI=10.1021/acs.orglett.0c00285;
RA Wei X., Matsuda Y.;
RT "Unraveling the fungal strategy for tetrahydroxanthone biosynthesis and
RT diversification.";
RL Org. Lett. 22:1919-1923(2020).
RN [4]
RP FUNCTION.
RX PubMed=33891392; DOI=10.1021/acs.jnatprod.1c00022;
RA Wei X., Chen X., Chen L., Yan D., Wang W.G., Matsuda Y.;
RT "Heterologous biosynthesis of tetrahydroxanthone dimers: determination of
RT key factors for selective or divergent synthesis.";
RL J. Nat. Prod. 84:1544-1549(2021).
CC -!- FUNCTION: Short chain dehydrogenase/reductase; part of the gene cluster
CC that mediates the biosynthesis of the tetrahydroxanthone dimer
CC neosartorin, which exhibits antibacterial activity (PubMed:30394754,
CC PubMed:32105084, PubMed:33891392). The two different monomeric units
CC appear to be synthesized by the same set of enzymes, among which the
CC Baeyer-Villiger monooxygenase nsrF is the key enzyme for the divergence
CC of the biosynthetic routes (PubMed:32105084). The pathway begins with
CC the synthesis of atrochrysone thioester by the polyketide synthase nsrB
CC (PubMed:32105084). The atrochrysone carboxyl ACP thioesterase nsrC then
CC breaks the thioester bond and releases the atrochrysone carboxylic acid
CC from AacuL (PubMed:32105084). Atrochrysone carboxylic acid is
CC decarboxylated by the decarboxylase nsrE, and oxidized by the anthrone
CC oxygenase nsrD to yield emodin (PubMed:32105084). Emodin is then
CC reduced to emodin hydroquinone by the oxidoreductase nsrR
CC (PubMed:32105084). A-ring reduction by the short chain dehydrogenase
CC nsrJ, dehydration by the scytalone dehydratase-like protein nsrI and
CC probable spontaneous re-oxidation, results in overall deoxygenation to
CC chrysophanol (PubMed:32105084). The Baeyer-Villiger monooxygenase nsrF
CC accepts chrysophanol as a substrate to insert one oxygen atom at two
CC different positions to yield the precursors of both monomric units
CC (PubMed:30394754, PubMed:32105084, PubMed:33891392). NsrF is
CC promiscuous/flexible in interacting with the 2 (non methylated and
CC methylated) aromatic rings of chrysophanol, thus diverging the
CC biosynthetic pathway at this point (PubMed:30394754, PubMed:32105084,
CC PubMed:33891392). After the hydrolysis of the lactones,
CC methylesterification by the methyltransferase nsrG yields respectively
CC moniliphenone and 2,2',6'-trihydroxy-4-methyl-6-methoxya-
CC cyldiphenylmethanone (PubMed:30394754, PubMed:32105084). The next steps
CC are the hydroxylation by the FAD-dependent monooxygenase nsrK, followed
CC by isomerization by the monooxygenase nsrQ (PubMed:32105084). The short
CC chain dehydrogenase/reductase nsrO then catalyzes the C-5 ketoreduction
CC to give the xanthone skeleton of blennolide C and 5-acetylblennolide A
CC (PubMed:32105084). The acetyltransferase nsrL has a strict substrate
CC specificity and uses only blennolide A but not blennolide C to yield 5-
CC acetylblennolide A as the single-acetylated product (PubMed:30394754).
CC In the final step of the biosynthesis, the heterodimerization of the 2
CC xanthones, blennolide C and 5-acetylblennolide A, is catalyzed by the
CC cytochrome P450 monooxygenase nsrP (PubMed:30394754). NsrP can utilize
CC at least three different xanthones as its substrates to perform the
CC dimerization reaction (PubMed:30394754). {ECO:0000269|PubMed:30394754,
CC ECO:0000269|PubMed:32105084, ECO:0000269|PubMed:33891392}.
CC -!- PATHWAY: Secondary metabolite biosynthesis.
CC {ECO:0000269|PubMed:30394754}.
CC -!- DISRUPTION PHENOTYPE: Impairs the production of neosartorin but
CC accumulates no metabolites related to the neosartorin pathway.
CC {ECO:0000269|PubMed:30394754}.
CC -!- SIMILARITY: Belongs to the short-chain dehydrogenases/reductases (SDR)
CC family. {ECO:0000305}.
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DR EMBL; MSZS01000005; PKX92295.1; -; Genomic_DNA.
DR SMR; A0A2I1C3V7; -.
DR VEuPathDB; FungiDB:P174DRAFT_421366; -.
DR OrthoDB; 1194344at2759; -.
DR Proteomes; UP000234474; Unassembled WGS sequence.
DR GO; GO:0016491; F:oxidoreductase activity; IEA:UniProtKB-KW.
DR InterPro; IPR036291; NAD(P)-bd_dom_sf.
DR InterPro; IPR020904; Sc_DH/Rdtase_CS.
DR InterPro; IPR002347; SDR_fam.
DR Pfam; PF00106; adh_short; 1.
DR PRINTS; PR00081; GDHRDH.
DR SUPFAM; SSF51735; SSF51735; 1.
DR PROSITE; PS00061; ADH_SHORT; 1.
PE 1: Evidence at protein level;
KW NAD; NADP; Oxidoreductase; Reference proteome.
FT CHAIN 1..290
FT /note="Short chain dehydrogenase/reductase nsrO"
FT /id="PRO_0000453453"
FT ACT_SITE 182
FT /note="Proton acceptor"
FT /evidence="ECO:0000250|UniProtKB:Q5BEK1"
FT BINDING 36..44
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /evidence="ECO:0000250|UniProtKB:Q92506"
FT BINDING 63..64
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /evidence="ECO:0000250|UniProtKB:Q92506"
FT BINDING 88..90
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /evidence="ECO:0000250|UniProtKB:Q92506"
FT BINDING 182..186
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /evidence="ECO:0000250|UniProtKB:Q92506"
FT BINDING 219..221
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /evidence="ECO:0000250|UniProtKB:Q92506"
SQ SEQUENCE 290 AA; 31571 MW; 93C61C25344BF923 CRC64;
MSLFEAQPRP TKIYHSETYD RIAKHHGFNG QGKVVLITGG ASGVGFSIAK AFAAAGVVCI
AIVSRSASPQ EQAKAALEAA YPSVRVVLFQ ASVTDSVRMP EILHELGPVD VLVLGVAVVH
RREKATAITE QELRDAFDTN VIAAFNLTKA YLETPLPASG QKTIINISSA AAQVHTTRRV
GYGSSKAAAA QVLQHFAVEQ EQEPDGNPVR IFSFHPGAFY TPAVAQHFTK DEHKWDDLAL
PGDFAVWLAG PESSFLHGRH LWANWDVDEL IGLRERVLQD RRFLTIGLVV
