7mn0

From Proteopedia

(Difference between revisions)

Current revision

N74D mutant of the HIV-1 capsid protein

Structural highlights

Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 2.9Å
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Publication Abstract from PubMed

The core of HIV-1 viruses bearing the capsid change N74D (HIV-1-N74D) do not bind the human protein CPSF6. In primary human CD4(+) T cells, HIV-1-N74D viruses exhibit an infectivity defect when compared to wild-type. We first investigated whether loss of CPSF6 binding accounts for the loss of infectivity. Depletion of CPSF6 in human CD4(+) T cells did not affect the early stages of wild-type HIV-1 replication, suggesting that defective infectivity in the case of HIV-1-N74D viruses is not due to the loss of CPSF6 binding. Based on our previous result that cyclophilin A (Cyp A) protected HIV-1 from human tripartite motif-containing protein 5alpha (TRIM5alphahu) restriction in CD4(+) T cells, we found that depletion of TRIM5alphahu in CD4(+) T cells rescued the infectivity of HIV-1-N74D, suggesting that HIV-1-N74D cores interacted with TRIM5alphahu. Accordingly, TRIM5alphahu binding to HIV-1-N74D cores was increased compared with that of wild-type cores, and consistently, HIV-1-N74D cores lost their ability to bind Cyp A. In agreement with the notion that N74D capsids are defective in their ability to bind Cyp A, we found that HIV-1-N74D viruses were 20-fold less sensitive to TRIMCyp restriction when compared to wild-type viruses in OMK cells. Structural analysis revealed that N74D hexameric capsid protein in complex with PF74 is different from wild-type hexameric capsid protein in complex with PF74, which explains the defect of N74D capsids to interact with Cyp A. In conclusion, we showed that the decreased infectivity of HIV-1-N74D in CD4(+) T cells is due to a loss of Cyp A protection from TRIM5alphahu restriction activity.

TRIM5alpha Restriction of HIV-1-N74D Viruses in Lymphocytes Is Caused by a Loss of Cyclophilin A Protection.,Selyutina A, Simons LM, Kirby KA, Bulnes-Ramos A, Hu P, Sarafianos SG, Hultquist JF, Diaz-Griffero F Viruses. 2022 Feb 10;14(2). pii: v14020363. doi: 10.3390/v14020363. PMID:35215956^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Selyutina A, Simons LM, Kirby KA, Bulnes-Ramos A, Hu P, Sarafianos SG, Hultquist JF, Diaz-Griffero F. TRIM5α Restriction of HIV-1-N74D Viruses in Lymphocytes Is Caused by a Loss of Cyclophilin A Protection. Viruses. 2022 Feb 10;14(2):363. PMID:35215956 doi:10.3390/v14020363

1 Structural highlights
2 Publication Abstract from PubMed
3 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/7mn0"

Categories: Large Structures | Gres AT | Kirby KA | Sarafianos SG

@@ Line 3: / Line 3: @@
 <StructureSection load='7mn0' size='340' side='right'caption='[[7mn0]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[7mn0]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Human_immunodeficiency_virus_1 Human immunodeficiency virus 1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7MN0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7MN0 FirstGlance]. <br>
+<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7MN0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7MN0 FirstGlance]. <br>
 </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.9&#8491;</td></tr>
 <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=IOD:IODIDE+ION'>IOD</scene></td></tr>
 <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=7mn0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7mn0 OCA], [https://pdbe.org/7mn0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7mn0 RCSB], [https://www.ebi.ac.uk/pdbsum/7mn0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7mn0 ProSAT]</span></td></tr>
 </table>
-== Function ==
-[https://www.uniprot.org/uniprot/GAG_HV1N5 GAG_HV1N5] Matrix protein p17 targets Gag and Gag-Pol polyproteins to the plasma membrane via a multipartite membrane binding signal, that includes its myristoylated N-terminus. Also mediates nuclear localization of the preintegration complex. Implicated in the release from host cell mediated by Vpu.  Capsid protein p24 forms the conical core of the virus that encapsulates the genomic RNA-nucleocapsid complex.  Nucleocapsid protein p7 encapsulates and protects viral dimeric unspliced (genomic) RNA. Binds these RNAs through its zinc fingers.  p6-gag plays a role in budding of the assembled particle by interacting with the host class E VPS proteins TSG101 and PDCD6IP/AIP1 (By similarity).
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
@@ Line 23: / Line 21: @@
 __TOC__
 </StructureSection>
-[[Category: Human immunodeficiency virus 1]]
 [[Category: Large Structures]]
 [[Category: Gres AT]]
 [[Category: Kirby KA]]
 [[Category: Sarafianos SG]]

7mn0

From Proteopedia

Current revision

N74D mutant of the HIV-1 capsid protein

Structural highlights

Publication Abstract from PubMed

References

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Proteopedia Page Contributors and Editors (what is this?)

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