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Entry version 133 (08 May 2019)
Sequence version 1 (01 Feb 1991)
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Envelope glycoprotein gp160



Human immunodeficiency virus type 1 group M subtype B (isolate MFA) (HIV-1)
Reviewed-Annotation score:

Annotation score:5 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>
-Experimental evidence at protein leveli <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

Envelope glycoprotein gp160: Oligomerizes in the host endoplasmic reticulum into predominantly trimers. In a second time, gp160 transits in the host Golgi, where glycosylation is completed. The precursor is then proteolytically cleaved in the trans-Golgi and thereby activated by cellular furin or furin-like proteases to produce gp120 and gp41.UniRule annotation
Surface protein gp120: Attaches the virus to the host lymphoid cell by binding to the primary receptor CD4. This interaction induces a structural rearrangement creating a high affinity binding site for a chemokine coreceptor like CXCR4 and/or CCR5. Acts as a ligand for CD209/DC-SIGN and CLEC4M/DC-SIGNR, which are respectively found on dendritic cells (DCs), and on endothelial cells of liver sinusoids and lymph node sinuses. These interactions allow capture of viral particles at mucosal surfaces by these cells and subsequent transmission to permissive cells. HIV subverts the migration properties of dendritic cells to gain access to CD4+ T-cells in lymph nodes. Virus transmission to permissive T-cells occurs either in trans (without DCs infection, through viral capture and transmission), or in cis (following DCs productive infection, through the usual CD4-gp120 interaction), thereby inducing a robust infection. In trans infection, bound virions remain infectious over days and it is proposed that they are not degraded, but protected in non-lysosomal acidic organelles within the DCs close to the cell membrane thus contributing to the viral infectious potential during DCs' migration from the periphery to the lymphoid tissues. On arrival at lymphoid tissues, intact virions recycle back to DCs' cell surface allowing virus transmission to CD4+ T-cells.UniRule annotation
Transmembrane protein gp41: Acts as a class I viral fusion protein. Under the current model, the protein has at least 3 conformational states: pre-fusion native state, pre-hairpin intermediate state, and post-fusion hairpin state. During fusion of viral and target intracellular membranes, the coiled coil regions (heptad repeats) assume a trimer-of-hairpins structure, positioning the fusion peptide in close proximity to the C-terminal region of the ectodomain. The formation of this structure appears to drive apposition and subsequent fusion of viral and target cell membranes. Complete fusion occurs in host cell endosomes and is dynamin-dependent, however some lipid transfer might occur at the plasma membrane. The virus undergoes clathrin-dependent internalization long before endosomal fusion, thus minimizing the surface exposure of conserved viral epitopes during fusion and reducing the efficacy of inhibitors targeting these epitopes. Membranes fusion leads to delivery of the nucleocapsid into the cytoplasm.UniRule annotation


Inhibitors targeting HIV-1 viral envelope proteins are used as antiretroviral drugs. Attachment of virions to the cell surface via non-specific interactions and CD4 binding can be blocked by inhibitors that include cyanovirin-N, cyclotriazadisulfonamide analogs, PRO 2000, TNX 355 and PRO 542. In addition, BMS 806 can block CD4-induced conformational changes. Env interactions with the coreceptor molecules can be targeted by CCR5 antagonists including SCH-D, maraviroc (UK 427857) and aplaviroc (GW 873140), and the CXCR4 antagonist AMD 070. Fusion of viral and cellular membranes can be inhibited by peptides such as enfuvirtide and tifuvirtide (T 1249). Resistance to inhibitors associated with mutations in Env are observed. Most of the time, single mutations confer only a modest reduction in drug susceptibility. Combination of several mutations is usually required to develop a high-level drug resistance.UniRule annotation
HIV-1 lineages are divided in three main groups, M (for Major), O (for Outlier), and N (for New, or Non-M, Non-O). The vast majority of strains found worldwide belong to the group M. Group O seems to be endemic to and largely confined to Cameroon and neighboring countries in West Central Africa, where these viruses represent a small minority of HIV-1 strains. The group N is represented by a limited number of isolates from Cameroonian persons. The group M is further subdivided in 9 clades or subtypes (A to D, F to H, J and K).UniRule annotation

<p>The <a href="">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="">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

Biological processApoptosis, Clathrin-mediated endocytosis of virus by host, Fusion of virus membrane with host endosomal membrane, Fusion of virus membrane with host membrane, Host-virus interaction, Viral attachment to host cell, Viral immunoevasion, Viral penetration into host cytoplasm, Virus endocytosis by host, Virus entry into host cell

Enzyme and pathway databases

Reactome - a knowledgebase of biological pathways and processes

R-HSA-5621480 Dectin-2 family

<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="">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:
Envelope glycoprotein gp160UniRule annotation
Alternative name(s):
Env polyproteinUniRule annotation
Cleaved into the following 2 chains:
Surface protein gp120UniRule annotation
Short name:
SUUniRule annotation
Alternative name(s):
Glycoprotein 120UniRule annotation
Short name:
gp120UniRule annotation
Transmembrane protein gp41UniRule annotation
Short name:
TMUniRule annotation
Alternative name(s):
Glycoprotein 41UniRule annotation
Short name:
gp41UniRule annotation
<p>This subsection of the <a href="">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:envUniRule annotation
<p>This subsection of the <a href="">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>OrganismiHuman immunodeficiency virus type 1 group M subtype B (isolate MFA) (HIV-1)
<p>This subsection of the <a href="">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 identifieri11704 [NCBI]
<p>This subsection of the <a href="">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 lineageiVirusesOrterviralesRetroviridaeOrthoretrovirinaeLentivirus
<p>This subsection of the <a href="">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]

<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

Surface protein gp120 :
Transmembrane protein gp41 :


Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="">'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 domaini33 – 682ExtracellularUniRule annotationAdd BLAST650
<p>This subsection of the <a href="">'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>Transmembranei683 – 703HelicalUniRule annotationAdd BLAST21
Topological domaini704 – 853CytoplasmicUniRule annotationAdd BLAST150

GO - Cellular componenti

Keywords - Cellular componenti

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

<p>This section provides information on the disease(s) and phenotype(s) associated with a protein.<p><a href='/help/pathology_and_biotech_section' target='_top'>More...</a></p>Pathology & Biotechi

Keywords - Diseasei


<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 – 32UniRule annotationAdd BLAST32
<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_000023949033 – 853Envelope glycoprotein gp160UniRule annotationAdd BLAST821
ChainiPRO_000003842133 – 509Surface protein gp120UniRule annotationAdd BLAST477
ChainiPRO_0000038422510 – 853Transmembrane protein gp41UniRule annotationAdd BLAST344

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 bondi54 ↔ 74UniRule annotation
<p>This subsection of the <a href="">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>Glycosylationi88N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Disulfide bondi119 ↔ 203UniRule annotation
Disulfide bondi126 ↔ 194UniRule annotation
Disulfide bondi131 ↔ 157UniRule annotation
Glycosylationi136N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi141N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi156N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi160N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi186N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi195N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Disulfide bondi216 ↔ 245UniRule annotation
Disulfide bondi226 ↔ 237UniRule annotation
Glycosylationi232N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi239N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi260N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi274N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi287N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi293N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Disulfide bondi294 ↔ 329UniRule annotation
Glycosylationi299N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi330N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi354N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Disulfide bondi376 ↔ 443UniRule annotation
Disulfide bondi383 ↔ 416UniRule annotation
Glycosylationi384N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi390N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi395N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi404N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi446N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi461N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Disulfide bondi596 ↔ 602UniRule annotation
Glycosylationi609N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi614N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi623N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi635N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
Glycosylationi672N-linked (GlcNAc...) asparagine; by hostUniRule annotation1
<p>This subsection of the <a href="">PTM / Processing</a> section specifies the position(s) and the type of covalently attached lipid group(s).<p><a href='/help/lipid' target='_top'>More...</a></p>Lipidationi762S-palmitoyl cysteine; by hostUniRule annotation1

<p>This subsection of the <a href="">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

Highly glycosylated by host. The high number of glycan on the protein is reffered to as 'glycan shield' because it contributes to hide protein sequence from adaptive immune system.UniRule annotation
Palmitoylation of the transmembrane protein and of Env polyprotein (prior to its proteolytic cleavage) is essential for their association with host cell membrane lipid rafts. Palmitoylation is therefore required for envelope trafficking to classical lipid rafts, but not for viral replication.UniRule annotation
Specific enzymatic cleavages in vivo yield mature proteins. Envelope glycoproteins are synthesized as an inactive precursor that is heavily N-glycosylated and processed likely by host cell furin in the Golgi to yield the mature SU and TM proteins. The cleavage site between SU and TM requires the minimal sequence [KR]-X-[KR]-R. About 2 of the 9 disulfide bonds of gp41 are reduced by P4HB/PDI, following binding to CD4 receptor.UniRule annotation


Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection describes interesting single amino acid sites on the sequence that are not defined in any other subsection. This subsection can be displayed in different sections (‘Function’, ‘PTM / Processing’, ‘Pathology and Biotech’) according to its content.<p><a href='/help/site' target='_top'>More...</a></p>Sitei509 – 510Cleavage; by host furinUniRule annotation2

Keywords - PTMi

Cleavage on pair of basic residues, Disulfide bond, Glycoprotein, Lipoprotein, Palmitate

Proteomic databases

PRoteomics IDEntifications database


<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="">'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="">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

The mature envelope protein (Env) consists of a homotrimer of non-covalently associated gp120-gp41 heterodimers. The resulting complex protrudes from the virus surface as a spike. There seems to be as few as 10 spikes on the average virion. Surface protein gp120 interacts with host CD4, CCR5 and CXCR4. Gp120 also interacts with the C-type lectins CD209/DC-SIGN and CLEC4M/DC-SIGNR (collectively referred to as DC-SIGN(R)). Gp120 and gp41 interact with GalCer. Gp120 interacts with host ITGA4/ITGB7 complex; on CD4+ T-cells, this interaction results in rapid activation of integrin ITGAL/LFA-1, which facilitates efficient cell-to-cell spreading of HIV-1. Gp120 interacts with cell-associated heparan sulfate; this interaction increases virus infectivity on permissive cells and may be involved in infection of CD4- cells.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

Secondary structure

Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details

3D structure databases

Select the link destinations:

Protein Data Bank Europe


Protein Data Bank RCSB


Protein Data Bank Japan

Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum

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


Database of comparative protein structure models


MobiDB: a database of protein disorder and mobility annotations


Miscellaneous databases

Relative evolutionary importance of amino acids within a protein sequence


<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


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>Regioni131 – 156V1UniRule annotationAdd BLAST26
Regioni157 – 194V2UniRule annotationAdd BLAST38
Regioni294 – 328V3UniRule annotationAdd BLAST35
Regioni362 – 372CD4-binding loopUniRule annotationAdd BLAST11
Regioni383 – 416V4UniRule annotationAdd BLAST34
Regioni459 – 469V5Add BLAST11
Regioni461 – 469V5UniRule annotation9
Regioni510 – 530Fusion peptideUniRule annotationAdd BLAST21
Regioni572 – 590ImmunosuppressionUniRule annotationAdd BLAST19
Regioni660 – 681MPER; binding to GalCerUniRule annotationAdd BLAST22

Coiled coil

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Family and domains’ section denotes the positions of regions of coiled coil within the protein.<p><a href='/help/coiled' target='_top'>More...</a></p>Coiled coili631 – 665UniRule annotationAdd BLAST35


Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Family and Domains’ section describes a short (usually not more than 20 amino acids) conserved sequence motif of biological significance.<p><a href='/help/motif' target='_top'>More...</a></p>Motifi710 – 713YXXL motif; contains endocytosis signalUniRule annotation4

<p>This subsection of the ‘Family and domains’ section provides general information on the biological role of a domain. The term ‘domain’ is intended here in its wide acceptation, it may be a structural domain, a transmembrane region or a functional domain. Several domains are described in this subsection.<p><a href='/help/domain_cc' target='_top'>More...</a></p>Domaini

Some of the most genetically diverse regions of the viral genome are present in Env. They are called variable regions 1 through 5 (V1 through V5). Coreceptor usage of gp120 is determined mainly by the primary structure of the third variable region (V3) in the outer domain of gp120. The sequence of V3 determines which coreceptor, CCR5 and/or CXCR4 (corresponding to R5/macrophage, X4/T cell and R5X4/T cell and macrophage tropism), is used to trigger the fusion potential of the Env complex, and hence which cells the virus can infect. Binding to CCR5 involves a region adjacent in addition to V3.UniRule annotation
The membrane proximal external region (MPER) present in gp41 is a tryptophan-rich region recognized by the antibodies 2F5, Z13, and 4E10. MPER seems to play a role in fusion.UniRule annotation
The 17 amino acids long immunosuppressive region is present in many retroviral envelope proteins. Synthetic peptides derived from this relatively conserved sequence inhibit immune function in vitro and in vivo.UniRule annotation
The YXXL motif is involved in determining the exact site of viral release at the surface of infected mononuclear cells and promotes endocytosis. YXXL and di-leucine endocytosis motifs interact directly or indirectly with the clathrin adapter complexes, opperate independently, and their activities are not additive.UniRule annotation
The CD4-binding region is targeted by the antibody b12.UniRule annotation

<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 HIV-1 env protein family.UniRule annotation

Keywords - Domaini

Coiled coil, Signal, Transmembrane, Transmembrane helix

Family and domain databases

Conserved Domains Database

cd09909 HIV-1-like_HR1-HR2, 1 hit

Gene3D Structural and Functional Annotation of Protein Families

Gene3Di, 2 hits

HAMAP database of protein families

MF_04083 HIV_ENV, 1 hit

Integrated resource of protein families, domains and functional sites

View protein in InterPro
IPR036377 Gp120_core_sf
IPR037527 Gp160
IPR000328 GP41-like
IPR000777 HIV1_Gp120

Pfam protein domain database

View protein in Pfam
PF00516 GP120, 1 hit
PF00517 GP41, 1 hit

Superfamily database of structural and functional annotation

SSF56502 SSF56502, 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="">length</a> and <a href="">molecular weight</a>.<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequencei

<p>This subsection of the <a href="">Sequence</a> section indicates if the <a href="">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="">Sequence</a> section indicates if the <a href="">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.

P19551-1 [UniParc]FASTAAdd to basket
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Mass (Da):96,912
Last modified:February 1, 1991 - 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="">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:i3377B993B6F22ABA

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database


GenBank nucleotide sequence database


DNA Data Bank of Japan; a nucleotide sequence database

Links Updated
M33943 Genomic RNA Translation: AAA44850.1

<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="">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

<p>This subsection of the <a href="">Cross-references</a> section provides links to various web resources that are relevant for a specific protein.<p><a href='/help/web_resource' target='_top'>More...</a></p>Web resourcesi


HIV drug resistance database

BioAfrica: HIV bioinformatics in Africa
HIV drug resistance mutations

Sequence databases

Select the link destinations:
Links Updated
M33943 Genomic RNA Translation: AAA44850.1

3D structure databases

Select the link destinations:
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum

Proteomic databases


Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Enzyme and pathway databases

ReactomeiR-HSA-5621480 Dectin-2 family

Miscellaneous databases


Family and domain databases

CDDicd09909 HIV-1-like_HR1-HR2, 1 hit
Gene3Di2.170.40.20, 2 hits
HAMAPiMF_04083 HIV_ENV, 1 hit
InterProiView protein in InterPro
IPR036377 Gp120_core_sf
IPR037527 Gp160
IPR000328 GP41-like
IPR000777 HIV1_Gp120
PfamiView protein in Pfam
PF00516 GP120, 1 hit
PF00517 GP41, 1 hit
SUPFAMiSSF56502 SSF56502, 1 hit

ProtoNet; Automatic hierarchical classification of proteins


<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 nameiENV_HV1MF
<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: P19551
<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="">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: February 1, 1991
Last sequence update: February 1, 1991
Last modified: May 8, 2019
This is version 133 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

Keywords - Technical termi



  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  2. SIMILARITY comments
    Index of protein domains and families
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