ID   G8HIE5_9INFA            Unreviewed;       566 AA.
AC   G8HIE5;
DT   25-JAN-2012, integrated into UniProtKB/TrEMBL.
DT   25-JAN-2012, sequence version 1.
DT   16-MAY-2012, entry version 3.
DE   SubName: Full=Hemagglutinin;
GN   Name=HA;
OS   Influenza A virus (A/Cambodia/T028/2009(H1N1)).
OC   Viruses; ssRNA negative-strand viruses; Orthomyxoviridae;
OC   Influenzavirus A.
OX   NCBI_TaxID=1076997;
RN   [1]
RP   NUCLEOTIDE SEQUENCE.
RC   STRAIN=A/Cambodia/T028/2009;
RA   Mardy S., Ly S., Heng S., Naughtin M., Vong S., Kitsutani P.,
RA   Vanra I., Rith S., Tarantola A., Ly S., Sar B., Nora C., Sokhal B.,
RA   Se Y., Timmermans A., Lon C., Barr I., Kelso A., Tyner S.,
RA   Saunders D., Ung S.A., Asgari N., Touch S., Buchy P.;
RT   "Characterization of human influenza virus circulation in Cambodia
RT   2006-2010.";
RL   Submitted (AUG-2011) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Binds to sialic acid-containing receptors on the cell
CC       surface, bringing about the attachment of the virus particle to
CC       the cell. This attachment induces virion internalization of about
CC       two third of the virus particles through clathrin-dependent
CC       endocytosis and about one third through a clathrin- and caveolin-
CC       independent pathway. Plays a major role in the determination of
CC       host range restriction and virulence. Class I viral fusion
CC       protein. Responsible for penetration of the virus into the cell
CC       cytoplasm by mediating the fusion of the membrane of the
CC       endocytosed virus particle with the endosomal membrane. Low pH in
CC       endosomes induces an irreversible conformational change in HA2,
CC       releasing the fusion hydrophobic peptide. Several trimers are
CC       required to form a competent fusion pore (By similarity).
CC   -!- SUBUNIT: Homotrimer of disulfide-linked HA1-HA2 (By similarity).
CC   -!- SIMILARITY: Belongs to the influenza viruses hemagglutinin family.
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DR   EMBL; JN588774; AEN68903.1; -; Viral_cRNA.
DR   GO; GO:0020002; C:host cell plasma membrane; IEA:UniProtKB-KW.
DR   GO; GO:0016021; C:integral to membrane; IEA:UniProtKB-KW.
DR   GO; GO:0019031; C:viral envelope; IEA:InterPro.
DR   GO; GO:0046789; F:host cell surface receptor binding; IEA:InterPro.
DR   GO; GO:0019064; P:viral envelope fusion with host membrane; IEA:InterPro.
DR   Gene3D; G3DSA:3.90.209.20; Haemagglutn_HA1_a/b; 1.
DR   Gene3D; G3DSA:2.10.77.10; Haemagglutn_HA1_b-ribbon; 1.
DR   Gene3D; G3DSA:3.90.20.10; Haemagglutn_stalk; 1.
DR   InterPro; IPR008980; Capsid_hemagglutn.
DR   InterPro; IPR013828; Hemagglutn_HA1_a/b_dom.
DR   InterPro; IPR013827; Hemagglutn_HA1_b-rbn_dom.
DR   InterPro; IPR000149; Hemagglutn_influenz_A.
DR   InterPro; IPR001364; Hemagglutn_influenz_A/B.
DR   InterPro; IPR013829; Hemagglutn_stalk.
DR   Pfam; PF00509; Hemagglutinin; 1.
DR   PRINTS; PR00330; HEMAGGLUTN1.
DR   PRINTS; PR00329; HEMAGGLUTN12.
DR   SUPFAM; SSF49818; Capsid_hemag; 1.
PE   3: Inferred from homology;
KW   Clathrin- and caveolin-independent endocytosis of virus by host;
KW   Clathrin-mediated endocytosis of virus by host; Disulfide bond;
KW   Fusion of virus membrane with host endosomal membrane;
KW   Fusion of virus membrane with host membrane; Hemagglutinin;
KW   Host cell membrane; Host membrane; Host-virus interaction;
KW   Initiation of viral infection; Membrane; Transmembrane;
KW   Transmembrane helix; Viral attachment to host cell;
KW   Viral envelope protein; Viral penetration into host cytoplasm; Virion;
KW   Virus endocytosis by host.
SQ   SEQUENCE   566 AA;  63222 MW;  99D3C9ADD706221D CRC64;
     MKAILVVLLY TFATANADTL CVGYHANNST DTVDTVLEKN VTVTHSVNLL EDKHNGKLCK
     LRGVAPLHLG KCNIAGWILG NPECESLSTA SSWSYIVETS SSDNGTCYPG DFIDYEELRE
     QLSSVSSFER FEIFPKTSSW PNHDSNKGVT AACPHAGAKS FYKNLIWLVK KGNSYPKLSK
     SYINDKGKEV LVLWGIHHPS TSADQQSLYQ NADAYVFVGT SRYSKKFKPE IAIRPKVRDQ
     EGRMNYYWTL VEPGDKITFE ATGNLVVPRY AFAMERNAGS GIIISDTPVH DCNTTCQTPK
     GAINTSLPFQ NIHPITIGKC PKYVKSTKLR LATGLRNVPS IQSRGLFGAI AGFIEGGWTG
     MVDGWYGYHH QNEQGSGYAA DLKSTQNAID EITNKVNSVI EKMNTQFTAV GKEFNHLEKR
     IENLNKKVDD GFLDIWTYNA ELLVLLENER TLDYHDSNVK NLYEKVRSQL KNNAKEIGNG
     CFEFYHKCDN TCMESVKNGT YDYPKYSEEA KLNREEIDGV KLESTRIYQI LAIYSTVASS
     LVLVVSLGAI SFWMCSNGSL QCRICI
//