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P19551

- ENV_HV1MF

UniProt

P19551 - ENV_HV1MF

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Protein
Envelope glycoprotein gp160
Gene
env
Organism
Human immunodeficiency virus type 1 group M subtype B (isolate MFA) (HIV-1)
Status
Reviewed - Annotation score: 5 out of 5 - Experimental evidence at protein leveli

Functioni

The surface protein gp120 (SU) 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. This peculiar 2 stage receptor-interaction strategy allows gp120 to maintain the highly conserved coreceptor-binding site in a cryptic conformation, protected from neutralizing antibodies. Since CD4 also displays a binding site for the disulfide-isomerase P4HB/PDI, a P4HB/PDI-CD4-CXCR4-gp120 complex may form. In that complex, P4HB/PDI could reach and reduce gp120 disulfide bonds, causing major conformational changes in gp120. TXN, another PDI family member could also be involved in disulfide rearrangements in Env during fusion. These changes are transmitted to the transmembrane protein gp41 and are thought to activate its fusogenic potential by unmasking its fusion peptide.
Surface protein gp120 (SU) may target the virus to gut-associated lymphoid tissue (GALT) by binding host ITGA4/ITGB7 (alpha-4/beta-7 integrins), a complex that mediates T-cell migration to the GALT. Interaction between gp120 and ITGA4/ITGB7 would allow the virus to enter GALT early in the infection, infecting and killing most of GALT's resting CD4+ T-cells. This T-cell depletion is believed to be the major insult to the host immune system leading to AIDS By similarity.
The surface protein gp120 is 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. DCs are professional antigen presenting cells, critical for host immunity by inducing specific immune responses against a broad variety of pathogens. They act as sentinels in various tissues where they take up antigen, process it, and present it to T-cells following migration to lymphoid organs. 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. Virion capture also seems to lead to MHC-II-restricted viral antigen presentation, and probably to the activation of HIV-specific CD4+ cells By similarity.
The transmembrane protein gp41 (TM) 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 By similarity.
The envelope glyprotein gp160 precursor down-modulates cell surface CD4 antigen by interacting with it in the endoplasmic reticulum and blocking its transport to the cell surface By similarity.
The gp120-gp41 heterodimer seems to contribute to T-cell depletion during HIV-1 infection. The envelope glycoproteins expressed on the surface of infected cells induce apoptosis through an interaction with uninfected cells expressing the receptor (CD4) and the coreceptors CXCR4 or CCR5. This type of bystander killing may be obtained by at least three distinct mechanisms. First, the interaction between the 2 cells can induce cellular fusion followed by nuclear fusion within the syncytium. Syncytia are condemned to die from apoptosis. Second, the 2 interacting cells may not fuse entirely and simply exchange plasma membrane lipids, after a sort of hemifusion process, followed by rapid death. Third, it is possible that virus-infected cells, on the point of undergoing apoptosis, fuse with CD4-expressing cells, in which case apoptosis is rapidly transmitted from one cell to the other and thus occurs in a sort of contagious fashion By similarity.
The gp120-gp41 heterodimer allows rapid transcytosis of the virus through CD4 negative cells such as simple epithelial monolayers of the intestinal, rectal and endocervical epithelial barriers. Both gp120 and gp41 specifically recognize glycosphingolipids galactosyl-ceramide (GalCer) or 3' sulfo-galactosyl-ceramide (GalS) present in the lipid rafts structures of epithelial cells. Binding to these alternative receptors allows the rapid transcytosis of the virus through the epithelial cells. This transcytotic vesicle-mediated transport of virions from the apical side to the basolateral side of the epithelial cells does not involve infection of the cells themselves By similarity.

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Sitei509 – 5102Cleavage; by host furin By similarity

GO - Molecular functioni

  1. structural molecule activity Source: InterPro
Complete GO annotation...

GO - Biological processi

  1. apoptotic process Source: UniProtKB-KW
  2. clathrin-mediated endocytosis of virus by host cell Source: UniProtKB-KW
  3. evasion or tolerance by virus of host immune response Source: UniProtKB-KW
  4. fusion of virus membrane with host endosome membrane Source: UniProtKB-KW
  5. virion attachment to host cell Source: UniProtKB-KW
Complete GO annotation...

Keywords - Biological processi

Apoptosis, 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

Names & Taxonomyi

Protein namesi
Recommended name:
Envelope glycoprotein gp160
Alternative name(s):
Env polyprotein
Cleaved into the following 2 chains:
Surface protein gp120
Short name:
SU
Alternative name(s):
Glycoprotein 120
Short name:
gp120
Alternative name(s):
Glycoprotein 41
Short name:
gp41
Gene namesi
Name:env
OrganismiHuman immunodeficiency virus type 1 group M subtype B (isolate MFA) (HIV-1)
Taxonomic identifieri11704 [NCBI]
Taxonomic lineageiVirusesRetro-transcribing virusesRetroviridaeOrthoretrovirinaeLentivirusPrimate lentivirus group
Virus hostiHomo sapiens (Human) [TaxID: 9606]

Subcellular locationi

Chain Transmembrane protein gp41 : Virion membrane; Single-pass type I membrane protein. Host cell membrane; Single-pass type I membrane protein. Host endosome membrane; Single-pass type I membrane protein Reviewed prediction
Note: It is probably concentrated at the site of budding and incorporated into the virions possibly by contacts between the cytoplasmic tail of Env and the N-terminus of Gag.
Chain Surface protein gp120 : Virion membrane; Peripheral membrane protein. Host cell membrane; Peripheral membrane protein. Host endosome membrane; Peripheral membrane protein Reviewed prediction
Note: The surface protein is not anchored to the viral envelope, but associates with the extravirion surface through its binding to TM. It is probably concentrated at the site of budding and incorporated into the virions possibly by contacts between the cytoplasmic tail of Env and the N-terminus of Gag.

Topology

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Topological domaini33 – 682650Extracellular Reviewed prediction
Add
BLAST
Transmembranei683 – 70321Helical; Reviewed prediction
Add
BLAST
Topological domaini704 – 853150Cytoplasmic Reviewed prediction
Add
BLAST

GO - Cellular componenti

  1. host cell endosome membrane Source: UniProtKB-SubCell
  2. host cell plasma membrane Source: UniProtKB-SubCell
  3. integral component of membrane Source: UniProtKB-KW
  4. viral envelope Source: UniProtKB-KW
  5. virion membrane Source: UniProtKB-SubCell
Complete GO annotation...

Keywords - Cellular componenti

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

Pathology & Biotechi

Keywords - Diseasei

AIDS

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Signal peptidei1 – 3232 By similarity
Add
BLAST
Chaini33 – 853821Envelope glycoprotein gp160
PRO_0000239490Add
BLAST
Chaini33 – 509477Surface protein gp120 By similarity
PRO_0000038421Add
BLAST
Chaini510 – 853344Transmembrane protein gp41 By similarity
PRO_0000038422Add
BLAST

Amino acid modifications

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Disulfide bondi54 ↔ 74 By similarity
Glycosylationi88 – 881N-linked (GlcNAc...); by host Reviewed prediction
Disulfide bondi119 ↔ 203 By similarity
Disulfide bondi126 ↔ 194 By similarity
Disulfide bondi131 ↔ 157 By similarity
Glycosylationi136 – 1361N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi141 – 1411N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi156 – 1561N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi160 – 1601N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi186 – 1861N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi195 – 1951N-linked (GlcNAc...); by host Reviewed prediction
Disulfide bondi216 ↔ 245 By similarity
Disulfide bondi226 ↔ 237 By similarity
Glycosylationi232 – 2321N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi239 – 2391N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi260 – 2601N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi274 – 2741N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi287 – 2871N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi293 – 2931N-linked (GlcNAc...); by host Reviewed prediction
Disulfide bondi294 ↔ 329 By similarity
Glycosylationi299 – 2991N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi330 – 3301N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi354 – 3541N-linked (GlcNAc...); by host Reviewed prediction
Disulfide bondi376 ↔ 443 By similarity
Disulfide bondi383 ↔ 416 By similarity
Glycosylationi384 – 3841N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi390 – 3901N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi395 – 3951N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi404 – 4041N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi446 – 4461N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi461 – 4611N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi609 – 6091N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi614 – 6141N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi623 – 6231N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi635 – 6351N-linked (GlcNAc...); by host Reviewed prediction
Glycosylationi672 – 6721N-linked (GlcNAc...); by host Reviewed prediction
Lipidationi762 – 7621S-palmitoyl cysteine; by host By similarity

Post-translational modificationi

Specific enzymatic cleavages in vivo yield mature proteins. Envelope glycoproteins are synthesized as a 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 By similarity.
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 By similarity.

Keywords - PTMi

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

Interactioni

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 human CD4, CCR5 and CXCR4, to form a P4HB/PDI-CD4-CXCR4-gp120 complex. 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 human ITGA4/ITGB7 complex; on CD4+ T-cells, this interaction results in rapid activation of integrin ITGAL/LFA-1, which facilitate 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 By similarity.

Structurei

Secondary structure

Legend: HelixTurnBeta strand
Show more details
Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Beta strandi84 – 885
Beta strandi91 – 944
Helixi99 – 11517
Beta strandi119 – 1257
Beta strandi128 – 1303
Beta strandi195 – 2006
Beta strandi221 – 2266
Beta strandi233 – 24513
Beta strandi254 – 2607
Beta strandi265 – 2673
Beta strandi269 – 2713
Beta strandi282 – 29514
Turni296 – 2983
Beta strandi328 – 3325
Helixi333 – 35119
Beta strandi356 – 3594
Helixi367 – 3704
Beta strandi371 – 3766
Beta strandi379 – 3835
Helixi386 – 3883
Beta strandi391 – 3933
Beta strandi410 – 42314
Beta strandi425 – 4284
Beta strandi430 – 4323
Beta strandi442 – 45413
Beta strandi461 – 4688
Helixi473 – 4819
Beta strandi484 – 4885

3D structure databases

Select the link destinations:
PDBe
RCSB PDB
PDBj
Links Updated
EntryMethodResolution (Å)ChainPositionsPDBsum
2NXZX-ray2.04A83-490[»]
2NY0X-ray2.20A83-490[»]
2NY2X-ray2.00A86-490[»]
2NY4X-ray2.00A83-490[»]
2NY5X-ray2.50G83-490[»]
2PJVNMR-A510-532[»]
3ECBX-ray1.70P309-318[»]
ProteinModelPortaliP19551.
SMRiP19551. Positions 84-133, 193-490, 510-663.

Miscellaneous databases

EvolutionaryTraceiP19551.

Family & Domainsi

Region

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Regioni131 – 15626V1
Add
BLAST
Regioni157 – 19438V2
Add
BLAST
Regioni294 – 32835V3
Add
BLAST
Regioni362 – 37211CD4-binding loop By similarity
Add
BLAST
Regioni383 – 41634V4
Add
BLAST
Regioni459 – 46911V5
Add
BLAST
Regioni510 – 53021Fusion peptide Reviewed prediction
Add
BLAST
Regioni574 – 59017Immunosuppression By similarity
Add
BLAST
Regioni660 – 68122MPER; binding to GalCer By similarity
Add
BLAST
Regioni660 – 6656Involved in GalCer binding By similarity

Coiled coil

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Coiled coili642 – 66524 Reviewed prediction
Add
BLAST

Motif

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Motifi710 – 7134YXXL motif; contains endocytosis signal By similarity

Domaini

The YXXL motif is involved in determining the exact site of viral release at the surface of infected mononuclear cells and promotes endocytosis By similarity.
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 By similarity.
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.

Keywords - Domaini

Coiled coil, Signal, Transmembrane, Transmembrane helix

Family and domain databases

Gene3Di2.170.40.20. 2 hits.
InterProiIPR000777. HIV1_GP160.
IPR000328. Retroviral_envelope_protein.
[Graphical view]
PfamiPF00516. GP120. 1 hit.
PF00517. GP41. 1 hit.
[Graphical view]
SUPFAMiSSF56502. SSF56502. 3 hits.

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

P19551-1 [UniParc]FASTAAdd to Basket

« Hide

MRVKEKYQHL WRWGWKWGIM LLGILMICSA TENLWVTVYY GVPVWKEATT    50
TLFCASDAKA YDTEVHNVCA THACVPTDPN PQEVILVNVT ENFDMWKNDM 100
VEQMHEDIIS LWDQSLKPCV KLTPLCVNLK CTDLKNDTNT NSSNGRMIME 150
KGEIKNCSFN ISTSIRNKVQ KEYAFFYKLD IRPIDNTTYR LISCNTSVIT 200
QACPKVSFEP IPIHYCAPAG FAILKCNDKT FNGTGPCTNV STVQCTHGIR 250
PVVSTQLLLN GSLAEEEGVI RSANFTDNAK TIIVQLNTSV EINCTRPNNN 300
TRKSIRIQRG PGRAFVTIGK IGNMRQAHCN ISRAKWMSTL KQIASKLREQ 350
FGNNKTVIFK QSSGGDPEIV THSFNCGGEF FYCNSTQLFN STWFNSTWST 400
EGSNNTEGSD TITLPCRIKQ FINMWQEVGK AMYAPPISGQ IRCSSNITGL 450
LLTRDGGKNT NESEVFRPGG GDMRDNWRSE LYKYKVVKIE TLGVAPTKAK 500
RRVVQREKRA VGIGALFLGF LGAAGSTMGA ASMTLTVQAR QLLSGIVQQQ 550
NNLLRAIEAQ QHLLQLTVWG IKQLQARILA VERYLKDQQL LGIWGCSGKL 600
ICTTAVPWNA SWSNKSLEQF WNNMTWMEWD REINNYTSLI HSLIDESQNQ 650
QEKNEQELLE LDKWASLWNW FNITNWLWYI KIFIMIVGGL VGLRIVFAVL 700
SIVNRVRQGY SPLSFQTHLP NRGGPDRPEG IEEEGGERDR DRSVRLVNGS 750
LALIWDDLRS LCLFSYHRLR DLLLIVTRIV ELLGRRGWEA LKYWWNLLQY 800
WSQELKNSAV SLLNATAIAV AEGTDRVIEV VQGAYRAIRH IPRRIRQGLE 850
RIL 853
Length:853
Mass (Da):96,912
Last modified:February 1, 1991 - v1
Checksum:i3377B993B6F22ABA
GO

Sequence databases

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

Cross-referencesi

Web resourcesi

hivdb

HIV drug resistance database

BioAfrica: HIV bioinformatics in Africa
HIV drug resistance mutations

Sequence databases

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

3D structure databases

Select the link destinations:
PDBe
RCSB PDB
PDBj
Links Updated
Entry Method Resolution (Å) Chain Positions PDBsum
2NXZ X-ray 2.04 A 83-490 [» ]
2NY0 X-ray 2.20 A 83-490 [» ]
2NY2 X-ray 2.00 A 86-490 [» ]
2NY4 X-ray 2.00 A 83-490 [» ]
2NY5 X-ray 2.50 G 83-490 [» ]
2PJV NMR - A 510-532 [» ]
3ECB X-ray 1.70 P 309-318 [» ]
ProteinModelPortali P19551.
SMRi P19551. Positions 84-133, 193-490, 510-663.
ModBasei Search...

Protocols and materials databases

Structural Biology Knowledgebase Search...

Miscellaneous databases

EvolutionaryTracei P19551.

Family and domain databases

Gene3Di 2.170.40.20. 2 hits.
InterProi IPR000777. HIV1_GP160.
IPR000328. Retroviral_envelope_protein.
[Graphical view ]
Pfami PF00516. GP120. 1 hit.
PF00517. GP41. 1 hit.
[Graphical view ]
SUPFAMi SSF56502. SSF56502. 3 hits.
ProtoNeti Search...

Publicationsi

  1. "Cloning and characterization of human immunodeficiency virus type 1 variants diminished in the ability to induce syncytium-independent cytolysis."
    Stevenson M., Haggerty S., Lamonica C., Mann A.M., Meier C., Wasiak A.
    J. Virol. 64:3792-3803(1990) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [GENOMIC RNA].
  2. "Pathogens target DC-SIGN to influence their fate DC-SIGN functions as a pathogen receptor with broad specificity."
    Geijtenbeek T.B., van Kooyk Y.
    APMIS 111:698-714(2003) [PubMed] [Europe PMC] [Abstract]
    Cited for: REVIEW.
  3. Cited for: REVIEW.
  4. Cited for: REVIEW.
  5. Cited for: REVIEW.
  6. "Emerging drug targets for antiretroviral therapy."
    Reeves J.D., Piefer A.J.
    Drugs 65:1747-1766(2005) [PubMed] [Europe PMC] [Abstract]
    Cited for: REVIEW.
  7. "HIV and the chemokine system: 10 years later."
    Lusso P.
    EMBO J. 25:447-456(2006) [PubMed] [Europe PMC] [Abstract]
    Cited for: REVIEW.

Entry informationi

Entry nameiENV_HV1MF
AccessioniPrimary (citable) accession number: P19551
Entry historyi
Integrated into UniProtKB/Swiss-Prot: February 1, 1991
Last sequence update: February 1, 1991
Last modified: July 9, 2014
This is version 105 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programViral Protein Annotation Program

Miscellaneousi

Miscellaneous

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.
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).

Keywords - Technical termi

3D-structure

Documents

  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references

External Data

Dasty 3

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