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Protein

Hemagglutinin-esterase-fusion glycoprotein

Gene

HE

Organism
Influenza C virus (strain C/California/1978)
Status
Reviewed-Annotation score:

Annotation score:4 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
-Protein inferred from homologyi <p>This indicates the type of evidence that supports the existence of the protein. Note that the ‘protein existence’ evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Binds to the N-acetyl-9-O-acetylneuraminic acid residues on the cell surface, bringing about the attachment of the virus particle to the cell. Plays a major role in the determination of host range restriction and virulence. Class I viral fusion protein. Responsible for penetration of the virus into the cell cytoplasm by mediating the fusion of the membrane of the endocytosed virus particle with the endosomal membrane. Low pH in endosomes induce an irreversible conformational change in HEF2, releasing the fusion hydrophobic peptide. Several trimers are required to form a competent fusion pore. Displays a receptor-destroying activity which is a neuraminidate-O-acetyl esterase. This activity cleaves off any receptor on the cell surface, which would otherwise prevent virions release. These cleavages prevent self-aggregation and ensure the efficient spread of the progeny virus from cell to cell.UniRule annotation

<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section describes the catalytic activity of an enzyme, i.e. a chemical reaction that the enzyme catalyzes.<p><a href='/help/catalytic_activity' target='_top'>More...</a></p>Catalytic activityi

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Function’ section is used for enzymes and indicates the residues directly involved in catalysis.<p><a href='/help/act_site' target='_top'>More...</a></p>Active sitei71NucleophileUniRule annotation1
Active sitei365Charge relay systemUniRule annotation1
Active sitei368Charge relay systemUniRule annotation1

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

GO - Biological processi

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Molecular functionHemagglutinin, Hydrolase
Biological processFusion of virus membrane with host endosomal membrane, Fusion of virus membrane with host membrane, Host-virus interaction, Viral attachment to host cell, Viral penetration into host cytoplasm, Virus endocytosis by host, Virus entry into host cell

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Hemagglutinin-esterase-fusion glycoproteinUniRule annotation (EC:3.1.1.53UniRule annotation)
Short name:
HEFUniRule annotation
Cleaved into the following 2 chains:
Hemagglutinin-esterase-fusion glycoprotein chain 1UniRule annotation
Short name:
HEF1UniRule annotation
Hemagglutinin-esterase-fusion glycoprotein chain 2UniRule annotation
Short name:
HEF2UniRule annotation
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: ‘Name’, ‘Synonyms’, ‘Ordered locus names’ and ‘ORF names’.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:HEUniRule annotation
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiInfluenza C virus (strain C/California/1978)
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the ‘taxonomic identifier’ or ‘taxid’.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri203224 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiVirusesssRNA virusesssRNA negative-strand virusesOrthomyxoviridaeGammainfluenzavirus
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section only exists in viral entries and indicates the host(s) either as a specific organism or taxonomic group of organisms that are susceptible to be infected by a virus.<p><a href='/help/virus_host' target='_top'>More...</a></p>Virus hostiHomo sapiens (Human) [TaxID: 9606]
Sus scrofa (Pig) [TaxID: 9823]

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular_location_section">'Subcellular location'</a> section describes the subcellular compartment where each non-membrane region of a membrane-spanning protein is found.<p><a href='/help/topo_dom' target='_top'>More...</a></p>Topological domaini15 – 629ExtracellularUniRule annotationAdd BLAST615
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular_location_section">'Subcellular location'</a> section describes the extent of a membrane-spanning region of the protein. It denotes the presence of both alpha-helical transmembrane regions and the membrane spanning regions of beta-barrel transmembrane proteins.<p><a href='/help/transmem' target='_top'>More...</a></p>Transmembranei630 – 650HelicalUniRule annotationAdd BLAST21
Topological domaini651 – 654CytoplasmicUniRule annotation4

GO - Cellular componenti

Keywords - Cellular componenti

Host cell membrane, Host membrane, Membrane, Viral envelope protein, Virion

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘PTM / Processing’ section denotes the presence of an N-terminal signal peptide.<p><a href='/help/signal' target='_top'>More...</a></p>Signal peptidei1 – 14UniRule annotationAdd BLAST14
<p>This subsection of the ‘PTM / Processing’ section describes the extent of a polypeptide chain in the mature protein following processing.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_000044055215 – 654Hemagglutinin-esterase-fusion glycoproteinUniRule annotationAdd BLAST640
ChainiPRO_000044055315 – 445Hemagglutinin-esterase-fusion glycoprotein chain 1UniRule annotationAdd BLAST431
ChainiPRO_0000440554446 – 654Hemagglutinin-esterase-fusion glycoprotein chain 2UniRule annotationAdd BLAST209

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the PTM / Processing":/help/ptm_processing_section section describes the positions of cysteine residues participating in disulfide bonds.<p><a href='/help/disulfid' target='_top'>More...</a></p>Disulfide bondi20 ↔ 582Interchain (between HEF1 and HEF2 chains)UniRule annotation
<p>This subsection of the <a href="http://www.uniprot.org/help/ptm_processing_section">PTM / Processing</a> section specifies the position and type of each covalently attached glycan group (mono-, di-, or polysaccharide).<p><a href='/help/carbohyd' target='_top'>More...</a></p>Glycosylationi26N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi61N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi143N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi188N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Disulfide bondi209 ↔ 251UniRule annotation
Disulfide bondi228 ↔ 315UniRule annotation
Disulfide bondi236 ↔ 288UniRule annotation
Glycosylationi394N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi551N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi602N-linked (GlcNAc...) asparagine; by hostUniRule annotation1

<p>This subsection of the <a href="http://www.uniprot.org/help/ptm_processing_section">PTM/processing</a> section describes post-translational modifications (PTMs). This subsection <strong>complements</strong> the information provided at the sequence level or describes modifications for which <strong>position-specific data is not yet available</strong>.<p><a href='/help/post-translational_modification' target='_top'>More...</a></p>Post-translational modificationi

In natural infection, inactive HEF is matured into HEF1 and HEF2 outside the cell by one or more trypsin-like, arginine-specific endoprotease.UniRule annotation

Keywords - PTMi

Disulfide bond, Glycoprotein

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction_section">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Homotrimer of disulfide-linked HEF1-HEF2.UniRule annotation

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

3D structure databases

Protein Model Portal of the PSI-Nature Structural Biology Knowledgebase

More...
ProteinModelPortali
P03465

SWISS-MODEL Repository - a database of annotated 3D protein structure models

More...
SMRi
P03465

Database of comparative protein structure models

More...
ModBasei
Search...

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Family and Domains’ section describes a region of interest that cannot be described in other subsections.<p><a href='/help/region' target='_top'>More...</a></p>Regioni15 – 40Fusion domain-1UniRule annotationAdd BLAST26
Regioni41 – 157Esterase domain-1UniRule annotationAdd BLAST117
Regioni157 – 309N-acetyl-9-O-acetylneuraminic acid bindingUniRule annotationAdd BLAST153
Regioni309 – 363Esterase domain-2UniRule annotationAdd BLAST55
Regioni364 – 654Fusion domain-2UniRule annotationAdd BLAST291

<p>This subsection of the ‘Family and domains’ section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Belongs to the influenza viruses hemagglutinin family.UniRule annotation

Keywords - Domaini

Signal, Transmembrane, Transmembrane helix

Family and domain databases

HAMAP database of protein families

More...
HAMAPi
MF_04072 INFV_HEMA, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR008980 Capsid_hemagglutn
IPR007142 Hemagglutn-estrase_core
IPR003860 Hemagglutn-estrase_hemagglutn
IPR001364 Hemagglutn_influenz_A/B
IPR014831 Hemagglutn_stalk_influenz-C

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF03996 Hema_esterase, 1 hit
PF02710 Hema_HEFG, 1 hit
PF08720 Hema_stalk, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF49818 SSF49818, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence_length">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>.<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequencei

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is in its mature form or if it represents the precursor.<p><a href='/help/sequence_processing' target='_top'>More...</a></p>Sequence processingi: The displayed sequence is further processed into a mature form.

P03465-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MFFSLLLMLG LTEAEKIKIC LQKQVNSSFS LHNGFGGNLY ATEEKRMFEL
60 70 80 90 100
VKPKAGASVL NQSTWIGFGD SRTDQSNSAF PRSLMSAKTA DKFRSLSGGS
110 120 130 140 150
LMLSMFGPPG KVDYLYQGCG KHKVFYEGVN WSPHAAIDCY RKNWTDIKLN
160 170 180 190 200
FQKSIYELAS QSHCMSLVNA LDKTIPLQVT KGVAKNCNNS FLKNPALYTQ
210 220 230 240 250
EVKPLEQICG EENLAFFTLP TQFGTYECKL HLVASCYFIY DSKEVYNKRG
260 270 280 290 300
CGNYFQVIYD SSGKVVGGLD NRVSPYTGNS GDTPTMQCDM LQLKPGRYSV
310 320 330 340 350
RSSPRFLLMP ERSYCFDMKE KGPVTAVQSI WGKGRKSDYA VDQACLSTPG
360 370 380 390 400
CMLIQKQKPY IGEADDHHGD QEMRELLSGL DYEARCISQS GWVNETSPFT
410 420 430 440 450
EEYLLPPKFG RCPLAAKEES IPKIPDGLLI PTSGTDTTVT KPKSRIFGID
460 470 480 490 500
DLIIGLLFVA IVEAGIGGYL LGSRKESGGG VTKESAEKGF EKIGNDIQIL
510 520 530 540 550
RSSTNIAIEK LNDRISHDEQ AIRDLTLEIE NARSEALLGE LGIIRALLVG
560 570 580 590 600
NISIGLQESL WELASEITNR AGDLAVEVSP GCWIIDNNIC DQSCQNFIFK
610 620 630 640 650
FNETAPVPTI PPLDTKIDLQ SDPFYWGSSL GLAITAANLM AALVISGIAI

CRTK
Length:654
Mass (Da):72,085
Last modified:July 21, 1986 - v1
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:i7F4C28D9EFD2E429
GO

Sequence databases

Protein sequence database of the Protein Information Resource

More...
PIRi
A04076 HMIVC8

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

PIRiA04076 HMIVC8

3D structure databases

ProteinModelPortaliP03465
SMRiP03465
ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Family and domain databases

HAMAPiMF_04072 INFV_HEMA, 1 hit
InterProiView protein in InterPro
IPR008980 Capsid_hemagglutn
IPR007142 Hemagglutn-estrase_core
IPR003860 Hemagglutn-estrase_hemagglutn
IPR001364 Hemagglutn_influenz_A/B
IPR014831 Hemagglutn_stalk_influenz-C
PfamiView protein in Pfam
PF03996 Hema_esterase, 1 hit
PF02710 Hema_HEFG, 1 hit
PF08720 Hema_stalk, 1 hit
SUPFAMiSSF49818 SSF49818, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the ‘Entry information’ section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiHEMA_INCCA
<p>This subsection of the ‘Entry information’ section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called ‘Primary (citable) accession number’.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: P03465
<p>This subsection of the ‘Entry information’ section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification (‘Last modified’). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 21, 1986
Last sequence update: July 21, 1986
Last modified: December 5, 2018
This is version 104 of the entry and version 1 of the sequence. See complete history.
<p>This subsection of the ‘Entry information’ section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programViral Protein Annotation Program

<p>This section contains any relevant information that doesn’t fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Documents

  1. SIMILARITY comments
    Index of protein domains and families
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