LCSG_PURLI
ID LCSG_PURLI Reviewed; 468 AA.
AC A0A179H2P2;
DT 10-APR-2019, integrated into UniProtKB/Swiss-Prot.
DT 07-SEP-2016, sequence version 1.
DT 03-AUG-2022, entry version 16.
DE RecName: Full=O-methyltransferase lcsG {ECO:0000303|PubMed:27416025};
DE EC=2.1.1.- {ECO:0000255|PROSITE-ProRule:PRU01020};
DE AltName: Full=Leucinostatins biosynthesis cluster protein G {ECO:0000303|PubMed:27416025};
GN Name=lcsG {ECO:0000303|PubMed:27416025}; ORFNames=VFPBJ_02521;
OS Purpureocillium lilacinum (Paecilomyces lilacinus).
OC Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Sordariomycetes;
OC Hypocreomycetidae; Hypocreales; Ophiocordycipitaceae; Purpureocillium.
OX NCBI_TaxID=33203;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA], IDENTIFICATION, FUNCTION,
RP INDUCTION, AND PATHWAY.
RC STRAIN=PLBJ-1;
RX PubMed=27416025; DOI=10.1371/journal.ppat.1005685;
RA Wang G., Liu Z., Lin R., Li E., Mao Z., Ling J., Yang Y., Yin W.B., Xie B.;
RT "Biosynthesis of antibiotic leucinostatins in bio-control fungus
RT Purpureocillium lilacinum and their inhibition on phytophthora revealed by
RT genome mining.";
RL PLoS Pathog. 12:E1005685-E1005685(2016).
CC -!- FUNCTION: O-methyltransferase; part of the gene cluster that mediates
CC the biosynthesis of the lipopeptide antibiotics leucinostatins that
CC show extensive biological activities, including antimalarial,
CC antiviral, antibacterial, antifungal, and antitumor activities, as well
CC as phytotoxic (PubMed:27416025). Leucinostatin A contains nine amino
CC acid residues, including the unusual amino acid 4-methyl-L-proline
CC (MePro), 2-amino-6-hydroxy-4-methyl-8-oxodecanoic acid (AHyMeOA), 3-
CC hydroxyleucine (HyLeu), alpha-aminoisobutyric acid (AIB), beta-Ala, a
CC 4-methylhex-2-enoic acid at the N-terminus as well as a N1,N1-
CC dimethylpropane-1,2-diamine (DPD) at the C-terminus (Probable). The
CC biosynthesis of leucinostatins is probably initiated with the assembly
CC of 4-methylhex-2-enoic acid by a reducing PKS. Two reducing polyketide
CC synthases, lcsB and lcsC, have been identified in the cluster and it is
CC not clear which is the one that assembles 4-methylhex-2-enoic acid
CC since both contain KS, AT, DH, cMT, ER, KR and ACP domains (Probable).
CC The polyketide residue might be transferred to the NRPS lcsA, mediated
CC by two additional enzymes, the acyl-CoA ligase lcsD and the
CC thioesterase lcsE. The linear polyketide carboxylic acid, which is
CC released from PKS, is converted to a CoA thioester by lcsD, and then
CC lcsE hydrolyzes the thiol bond and shuttles the polyketide intermediate
CC to lcsA (Probable). The C domain of the first module catalyzed the
CC condensation of 4-methylhex-2-enoic acid and MePro carried by domain
CC A1, followed by successive condensations of nine amino acids to trigger
CC the elongation of the linear peptide. A5 and A6 domains of lcsA are
CC proposed to incorporate leucine, A2 AHyMeOA, and A3 incorporates HyLeu.
CC A4, A7 and A8 incorporate AIB (Probable). The AHyMeOA in leucinostatin
CC A activated by the A2 might be produced by the second PKS (lcsB or
CC lcsC) present within the cluster (Probable). The MePro is probably
CC produced via leucine cyclization and may originate from a separate
CC pathway, independent of the cluster. Another nonproteinogenic amino
CC acid, beta-Ala, could be produced by an aspartic acid decarboxylase
CC also localized outside of the cluster. Two candidates are VFPBJ_01400
CC and VFPBJ_10476 (Probable). The final peptide scaffold may be released
CC by the NAD(P)H-dependent thioester reductase (TE) at the C-terminal
CC region of lcsA (Probable). Transamination of the lcsA product by the
CC transaminase lcsP may produce DPD at the C-terminus (Probable). Further
CC hydroxylation steps performed alternatively by the cytochrome P450
CC monooxygenases lcsI, lcsK and lcsN then yield the non-methylated
CC leucinostatins precursor. It is also possible that leucines can be
CC hydroxylated prior to their incorporation into the peptide (Probable).
CC Varying extents of methylation then lead to the formation of
CC leucinostatins A and B (Probable). {ECO:0000269|PubMed:27416025,
CC ECO:0000305|PubMed:27416025}.
CC -!- PATHWAY: Secondary metabolite biosynthesis.
CC {ECO:0000305|PubMed:27416025}.
CC -!- INDUCTION: Expression is positively regulated by the leucinostatins
CC biosynthesis cluster-specific transcription regulator lcsF.
CC {ECO:0000269|PubMed:27416025}.
CC -!- SIMILARITY: Belongs to the class I-like SAM-binding methyltransferase
CC superfamily. Cation-independent O-methyltransferase family.
CC {ECO:0000255|PROSITE-ProRule:PRU01020}.
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DR EMBL; LSBH01000002; OAQ83753.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A179H2P2; -.
DR SMR; A0A179H2P2; -.
DR EnsemblFungi; OAQ83753; OAQ83753; VFPBJ_02521.
DR Proteomes; UP000078240; Unassembled WGS sequence.
DR GO; GO:0008171; F:O-methyltransferase activity; IEA:InterPro.
DR GO; GO:0032259; P:methylation; IEA:UniProtKB-KW.
DR Gene3D; 3.40.50.150; -; 1.
DR InterPro; IPR016461; COMT-like.
DR InterPro; IPR001077; O_MeTrfase_dom.
DR InterPro; IPR029063; SAM-dependent_MTases_sf.
DR Pfam; PF00891; Methyltransf_2; 1.
DR SUPFAM; SSF53335; SSF53335; 1.
DR PROSITE; PS51683; SAM_OMT_II; 1.
PE 2: Evidence at transcript level;
KW Methyltransferase; S-adenosyl-L-methionine; Transferase.
FT CHAIN 1..468
FT /note="O-methyltransferase lcsG"
FT /id="PRO_0000446608"
FT REGION 1..29
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 1..24
FT /note="Polar residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT BINDING 298..299
FT /ligand="S-adenosyl-L-methionine"
FT /ligand_id="ChEBI:CHEBI:59789"
FT /evidence="ECO:0000250|UniProtKB:O04385"
FT BINDING 321
FT /ligand="S-adenosyl-L-methionine"
FT /ligand_id="ChEBI:CHEBI:59789"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01020"
FT BINDING 348..349
FT /ligand="S-adenosyl-L-methionine"
FT /ligand_id="ChEBI:CHEBI:59789"
FT /evidence="ECO:0000250|UniProtKB:O04385"
FT BINDING 363
FT /ligand="S-adenosyl-L-methionine"
FT /ligand_id="ChEBI:CHEBI:59789"
FT /evidence="ECO:0000250|UniProtKB:O04385"
SQ SEQUENCE 468 AA; 51937 MW; 3F4D04C0D59240F5 CRC64;
MGDNVQSDTT AAQAGITDAP TAPTSAPVSL KERLEKLIES SQQLIKRMDE NNIPDPTFAP
ECQEDYSKLP PETITERFAL LDLLNDVTFL VHGASQSITD VAQNAMADSA TLNILNYFNF
WDVIPLDGDA SFAEIAKAVR LPQEAVEAIL PYAFSNRIFE PVTIGDPNSR IRHTSRSAAM
IKDPTLRIIV NLTIDGLAGP LSILNRALEK NFLGKEKLTN EISETPFGML YNKGGPLGEY
KDYYDWLDRD GEGERKGWRQ RDMVESLRLA KEKMGAESAL LEALDWAGAG KATVVDLGGS
GGHDDVPLAE KFPDLKIIVQ DLPSCQPKFD DGYISDELKK RVSFLAHDFF TPQPVQADIY
LFKWVFYDWS NKDIVKIIKA LVPALRPGAR VLVLDLMVDV GPEAAAVMPR SLLKYSNVIS
LKTLSLFGHT KQATKKMTDL FKAADDRFEI VRDEVAGTFM TFEAVWRG
