ID   FUS_NDVB1               Reviewed;         553 AA.
AC   Q9DLD4;
DT   19-JAN-2010, integrated into UniProtKB/Swiss-Prot.
DT   01-MAR-2001, sequence version 1.
DT   25-MAY-2022, entry version 72.
DE   RecName: Full=Fusion glycoprotein F0;
DE   Contains:
DE     RecName: Full=Fusion glycoprotein F2;
DE   Contains:
DE     RecName: Full=Fusion glycoprotein F1;
DE   Flags: Precursor;
GN   Name=F;
OS   Newcastle disease virus (strain Chicken/United States/B1/48) (NDV).
OC   Viruses; Riboviria; Orthornavirae; Negarnaviricota; Haploviricotina;
OC   Monjiviricetes; Mononegavirales; Paramyxoviridae; Avulavirinae;
OC   Orthoavulavirus; Avian orthoavulavirus 1.
OX   NCBI_TaxID=652953;
OH   NCBI_TaxID=9031; Gallus gallus (Chicken).
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC RNA].
RA   Sellers H.S., Seal B.S.;
RT   "Complete sequence for the B1 strain of Newcastle disease virus.";
RL   Submitted (SEP-2000) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Class I viral fusion protein. Under the current model, the
CC       protein has at least 3 conformational states: pre-fusion native state,
CC       pre-hairpin intermediate state, and post-fusion hairpin state. During
CC       viral and plasma cell membrane fusion, the heptad repeat (HR) regions
CC       assume a trimer-of-hairpins structure, positioning the fusion peptide
CC       in close proximity to the C-terminal region of the ectodomain. The
CC       formation of this structure appears to drive apposition and subsequent
CC       fusion of viral and plasma cell membranes. Directs fusion of viral and
CC       cellular membranes leading to delivery of the nucleocapsid into the
CC       cytoplasm. This fusion is pH independent and occurs directly at the
CC       outer cell membrane. The trimer of F1-F2 (F protein) probably interacts
CC       with HN at the virion surface. Upon HN binding to its cellular
CC       receptor, the hydrophobic fusion peptide is unmasked and interacts with
CC       the cellular membrane, inducing the fusion between cell and virion
CC       membranes. Later in infection, F proteins expressed at the plasma
CC       membrane of infected cells could mediate fusion with adjacent cells to
CC       form syncytia, a cytopathic effect that could lead to tissue necrosis
CC       (By similarity). {ECO:0000250}.
CC   -!- SUBUNIT: Homotrimer of disulfide-linked F1-F2. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Virion membrane {ECO:0000250}; Single-pass type I
CC       membrane protein {ECO:0000250}. Host cell membrane {ECO:0000250};
CC       Single-pass membrane protein {ECO:0000250}.
CC   -!- PTM: The inactive precursor F0 is glycosylated and proteolytically
CC       cleaved into F1 and F2 to be functionally active. The cleavage is
CC       mediated by cellular proteases during the transport and maturation of
CC       the polypeptide (By similarity). {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the paramyxoviruses fusion glycoprotein family.
CC       {ECO:0000305}.
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DR   EMBL; AF309418; AAG36978.1; -; Genomic_RNA.
DR   RefSeq; NP_071469.1; NC_002617.1.
DR   SMR; Q9DLD4; -.
DR   Proteomes; UP000002328; Genome.
DR   GO; GO:0020002; C:host cell plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0019031; C:viral envelope; IEA:UniProtKB-KW.
DR   GO; GO:0055036; C:virion membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0019064; P:fusion of virus membrane with host plasma membrane; IEA:UniProtKB-KW.
DR   GO; GO:0046718; P:viral entry into host cell; IEA:UniProtKB-KW.
DR   InterPro; IPR000776; Fusion_F0_Paramyxovir.
DR   Pfam; PF00523; Fusion_gly; 1.
PE   3: Inferred from homology;
KW   Coiled coil; Disulfide bond;
KW   Fusion of virus membrane with host cell membrane;
KW   Fusion of virus membrane with host membrane; Glycoprotein;
KW   Host cell membrane; Host membrane; Lipoprotein; Membrane; Palmitate;
KW   Reference proteome; Signal; Transmembrane; Transmembrane helix;
KW   Viral envelope protein; Viral penetration into host cytoplasm; Virion;
KW   Virus entry into host cell.
FT   SIGNAL          1..31
FT                   /evidence="ECO:0000255"
FT   CHAIN           32..553
FT                   /note="Fusion glycoprotein F0"
FT                   /id="PRO_0000390623"
FT   CHAIN           32..116
FT                   /note="Fusion glycoprotein F2"
FT                   /id="PRO_0000390624"
FT   CHAIN           117..553
FT                   /note="Fusion glycoprotein F1"
FT                   /id="PRO_0000390625"
FT   TOPO_DOM        31..500
FT                   /note="Extracellular"
FT                   /evidence="ECO:0000250"
FT   TRANSMEM        501..521
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        522..553
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000250"
FT   COILED          463..499
FT                   /evidence="ECO:0000255"
FT   LIPID           523
FT                   /note="S-palmitoyl cysteine; by host"
FT                   /evidence="ECO:0000255"
FT   CARBOHYD        85
FT                   /note="N-linked (GlcNAc...) asparagine; by host"
FT                   /evidence="ECO:0000255"
FT   CARBOHYD        191
FT                   /note="N-linked (GlcNAc...) asparagine; by host"
FT                   /evidence="ECO:0000255"
FT   CARBOHYD        366
FT                   /note="N-linked (GlcNAc...) asparagine; by host"
FT                   /evidence="ECO:0000255"
FT   CARBOHYD        447
FT                   /note="N-linked (GlcNAc...) asparagine; by host"
FT                   /evidence="ECO:0000255"
FT   CARBOHYD        471
FT                   /note="N-linked (GlcNAc...) asparagine; by host"
FT                   /evidence="ECO:0000255"
FT   DISULFID        76..199
FT                   /note="Interchain (between F2 and F1 chains)"
FT                   /evidence="ECO:0000250"
FT   DISULFID        338..347
FT                   /evidence="ECO:0000250"
FT   DISULFID        362..370
FT                   /evidence="ECO:0000250"
FT   DISULFID        394..399
FT                   /evidence="ECO:0000250"
FT   DISULFID        401..424
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   553 AA;  59004 MW;  B19767CA1189660A CRC64;
     MGSRPFTKNP APMMLTIRVA LVLSCICPAN SIDGRPFAAA GIVVTGDKAV NIYTSSQTGS
     IIVKLLPNLP KDKEACAKAP LDAYNRTLTT LLTPLGDSIR RIQESVTTSG GGRQGRLIGA
     IIGGVALGVA TAAQITAAAA LIQAKQNAAN ILRLKESIAA TNEAVHEVTD GLSQLAVAVG
     KMQQFVNDQF NKTAQELDCI KIAQQVGVEL NLYLTELTTV FGPQITSPAL NKLTIQALYN
     LAGGNMDYLL TKLGIGNNQL SSLIGSGLIT GNPILYDSQT QLLGIQVTLP SVGNLNNMRA
     TYLETLSVST TRGFASALVP KVVTQVGSVI EELDTSYCIE TDLDLYCTRI VTFPMSPGIY
     SCLSGNTSAC MYSKTEGALT TPYMTIKGSV IANCKMTTCR CVNPPGIISQ NYGEAVSLID
     KQSCNVLSLG GITLRLSGEF DVTYQKNISI QDSQVIITGN LDISTELGNV NNSISNALNK
     LEESNRKLDK VNVKLTSTSA LITYIVLTII SLVFGILSLI LACYLMYKQK AQQKTLLWLG
     NNTLDQMRAT TKM