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- PDB-8sxj: CH505 Disulfide Stapled SOSIP Bound to CH235.12 Fab -

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Basic information

Entry
Database: PDB / ID: 8sxj
TitleCH505 Disulfide Stapled SOSIP Bound to CH235.12 Fab
Components
  • CH235.12 Heavy Chain
  • CH235.12 Light Chain
  • Envelope glycoprotein gp160
  • HIV-1 gp41
KeywordsVIRAL PROTEIN/Immune System / HIV-1 / Envelope / Env / Ectodomain / Fusion protein / VIRAL PROTEIN / VIRAL PROTEIN-Immune System complex
Function / homology
Function and homology information


positive regulation of plasma membrane raft polarization / positive regulation of receptor clustering / positive regulation of establishment of T cell polarity / virus-mediated perturbation of host defense response / host cell endosome membrane / clathrin-dependent endocytosis of virus by host cell / viral protein processing / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope ...positive regulation of plasma membrane raft polarization / positive regulation of receptor clustering / positive regulation of establishment of T cell polarity / virus-mediated perturbation of host defense response / host cell endosome membrane / clathrin-dependent endocytosis of virus by host cell / viral protein processing / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / virion attachment to host cell / host cell plasma membrane / virion membrane / structural molecule activity / plasma membrane
Similarity search - Function
Envelope glycoprotein Gp160 / Retroviral envelope protein / Retroviral envelope protein GP41-like / Gp120 core superfamily / Envelope glycoprotein GP120 / Human immunodeficiency virus 1, envelope glycoprotein Gp120
Similarity search - Domain/homology
Envelope glycoprotein gp160
Similarity search - Component
Biological speciesHuman immunodeficiency virus 1
Homo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4 Å
AuthorsHenderson, R.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID) United States
CitationJournal: Sci Adv / Year: 2024
Title: Microsecond dynamics control the HIV-1 Envelope conformation.
Authors: Ashley L Bennett / Robert Edwards / Irina Kosheleva / Carrie Saunders / Yishak Bililign / Ashliegh Williams / Pimthada Bubphamala / Katayoun Manosouri / Kara Anasti / Kevin O Saunders / S ...Authors: Ashley L Bennett / Robert Edwards / Irina Kosheleva / Carrie Saunders / Yishak Bililign / Ashliegh Williams / Pimthada Bubphamala / Katayoun Manosouri / Kara Anasti / Kevin O Saunders / S Munir Alam / Barton F Haynes / Priyamvada Acharya / Rory Henderson /
Abstract: The HIV-1 Envelope (Env) glycoprotein facilitates host cell fusion through a complex series of receptor-induced structural changes. Although remarkable progress has been made in understanding the ...The HIV-1 Envelope (Env) glycoprotein facilitates host cell fusion through a complex series of receptor-induced structural changes. Although remarkable progress has been made in understanding the structures of various Env conformations, microsecond timescale dynamics have not been studied experimentally. Here, we used time-resolved, temperature-jump small-angle x-ray scattering to monitor structural rearrangements in an HIV-1 Env SOSIP ectodomain construct with microsecond precision. In two distinct Env variants, we detected a transition that correlated with known Env structure rearrangements with a time constant in the hundreds of microseconds range. A previously unknown structural transition was also observed, which occurred with a time constant below 10 μs, and involved an order-to-disorder transition in the trimer apex. Using this information, we engineered an Env SOSIP construct that locks the trimer in the prefusion closed state by connecting adjacent protomers via disulfides. Our findings show that the microsecond timescale structural dynamics play an essential role in controlling the Env conformation with impacts on vaccine design.
History
DepositionMay 22, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Feb 14, 2024Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Envelope glycoprotein gp160
B: HIV-1 gp41
C: CH235.12 Heavy Chain
D: CH235.12 Light Chain
E: Envelope glycoprotein gp160
F: HIV-1 gp41
G: CH235.12 Heavy Chain
H: CH235.12 Light Chain
I: Envelope glycoprotein gp160
J: HIV-1 gp41
K: CH235.12 Heavy Chain
L: CH235.12 Light Chain


Theoretical massNumber of molelcules
Total (without water)272,99112
Polymers272,99112
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein Envelope glycoprotein gp160 / Env polyprotein


Mass: 51446.805 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Human immunodeficiency virus 1 / Gene: env / Production host: Homo sapiens (human) / References: UniProt: M4M3Q1
#2: Protein HIV-1 gp41


Mass: 14265.115 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Human immunodeficiency virus 1 / Production host: Homo sapiens (human)
#3: Antibody CH235.12 Heavy Chain


Mass: 13723.414 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#4: Antibody CH235.12 Light Chain


Mass: 11561.793 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Human immunodeficiency virus 1Subtypes of HIV / Type: VIRUS / Entity ID: all / Source: RECOMBINANT
Source (natural)Organism: Human immunodeficiency virus 1
Source (recombinant)Organism: Homo sapiens (human)
Details of virusEmpty: NO / Enveloped: YES / Isolate: SUBSPECIES / Type: VIRION
Buffer solutionpH: 7.1
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company
MicroscopyModel: FEI TALOS ARCTICA
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2800 nm / Nominal defocus min: 100 nm
Image recordingElectron dose: 57 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 116771 / Symmetry type: POINT

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