ID   PHAT1_AMAEX             Reviewed;          23 AA.
AC   A0A023UBX6;
DT   28-MAR-2018, integrated into UniProtKB/Swiss-Prot.
DT   09-JUL-2014, sequence version 1.
DT   25-MAY-2022, entry version 11.
DE   RecName: Full=Phallacidin proprotein 1 {ECO:0000303|PubMed:24613547};
DE   Contains:
DE     RecName: Full=Phallacidin {ECO:0000303|PubMed:24613547};
DE   Flags: Precursor; Fragment;
GN   Name=PHA3 {ECO:0000303|PubMed:24613547};
GN   Synonyms=PHA2 {ECO:0000303|PubMed:24613547},
GN   PHA4 {ECO:0000303|PubMed:24613547};
OS   Amanita exitialis (Guangzhou destroying angel).
OC   Eukaryota; Fungi; Dikarya; Basidiomycota; Agaricomycotina; Agaricomycetes;
OC   Agaricomycetidae; Agaricales; Amanitaceae; Amanita.
OX   NCBI_TaxID=262245;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA], AND FUNCTION.
RX   PubMed=24613547; DOI=10.1016/j.toxicon.2014.02.020;
RA   Li P., Deng W., Li T.;
RT   "The molecular diversity of toxin gene families in lethal Amanita
RT   mushrooms.";
RL   Toxicon 83:59-68(2014).
CC   -!- FUNCTION: Toxin that belongs to the bicyclic heptapeptides called
CC       phallotoxins (PubMed:24613547). Although structurally related to
CC       amatoxins, phallotoxins have a different mode of action, which is the
CC       stabilization of F-actin (PubMed:24613547). Phallotoxins are poisonous
CC       when administered parenterally, but not orally because of poor
CC       absorption (PubMed:24613547). {ECO:0000305|PubMed:24613547}.
CC   -!- PTM: Processed by the macrocyclase-peptidase enzyme POPB to yield a
CC       toxic cyclic heptapeptide (By similarity). POPB first removes 10
CC       residues from the N-terminus (By similarity). Conformational trapping
CC       of the remaining peptide forces the enzyme to release this intermediate
CC       rather than proceed to macrocyclization (By similarity). The enzyme
CC       rebinds the remaining peptide in a different conformation and catalyzes
CC       macrocyclization of the N-terminal 7 residues (By similarity).
CC       {ECO:0000250|UniProtKB:A0A067SLB9}.
CC   -!- SIMILARITY: Belongs to the MSDIN fungal toxin family. {ECO:0000305}.
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DR   EMBL; KC778564; AGO98220.1; -; Genomic_DNA.
DR   EMBL; KC778565; AGO98221.1; -; Genomic_DNA.
DR   EMBL; KC778566; AGO98222.1; -; Genomic_DNA.
DR   EMBL; KF546293; AHX98317.1; -; Genomic_DNA.
DR   EMBL; KF546294; AHX98318.1; -; Genomic_DNA.
DR   EMBL; KF546295; AHX98319.1; -; Genomic_DNA.
DR   AlphaFoldDB; A0A023UBX6; -.
DR   GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
DR   InterPro; IPR027582; Amanitin/phalloidin.
DR   TIGRFAMs; TIGR04309; amanitin; 1.
PE   3: Inferred from homology;
KW   Thioether bond; Toxin.
FT   PROPEP          1
FT                   /evidence="ECO:0000250|UniProtKB:A8W7M4"
FT                   /id="PRO_0000443614"
FT   PEPTIDE         2..8
FT                   /note="Phallacidin"
FT                   /evidence="ECO:0000250|UniProtKB:A8W7M4"
FT                   /id="PRO_0000443615"
FT   PROPEP          9..23
FT                   /evidence="ECO:0000250|UniProtKB:A8W7M4"
FT                   /id="PRO_0000443616"
FT   CROSSLNK        2..8
FT                   /note="Cyclopeptide (Ala-Pro)"
FT                   /evidence="ECO:0000250|UniProtKB:A8W7M4"
FT   CROSSLNK        3..7
FT                   /note="2'-cysteinyl-6'-hydroxytryptophan sulfoxide (Trp-
FT                   Cys)"
FT                   /evidence="ECO:0000250|UniProtKB:P85421"
FT   NON_TER         1
FT                   /evidence="ECO:0000305"
SQ   SEQUENCE   23 AA;  2585 MW;  1D7F8C6B3622C7E5 CRC64;
     PAWLVDCPCV GDDVNRLLTR GER