6B0N

Crystal structure of the cleavage-independent prefusion HIV Env glycoprotein trimer of the clade A BG505 isolate (NFL construct) in complex with Fabs PGT122 and PGV19 at 3.39 A

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.40 Å
  • R-Value Free: 0.346 
  • R-Value Work: 0.335 
  • R-Value Observed: 0.336 

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Literature

Structure of a cleavage-independent HIV Env recapitulates the glycoprotein architecture of the native cleaved trimer.

Sarkar, A., Bale, S., Behrens, A.J., Kumar, S., Sharma, S.K., de Val, N., Pallesen, J., Irimia, A., Diwanji, D.C., Stanfield, R.L., Ward, A.B., Crispin, M., Wyatt, R.T., Wilson, I.A.

(2018) Nat Commun 9: 1956-1956

  • DOI: https://doi.org/10.1038/s41467-018-04272-y
  • Primary Citation of Related Structures:  
    6AVN, 6B0N

  • PubMed Abstract: 

    • Furin cleavage of the HIV envelope glycoprotein is an essential step for cell entry that enables formation of well-folded, native-like glycosylated trimers, releases constraints on the fusion peptide, and limits enzymatic processing of the N-glycan shield ...

    Furin cleavage of the HIV envelope glycoprotein is an essential step for cell entry that enables formation of well-folded, native-like glycosylated trimers, releases constraints on the fusion peptide, and limits enzymatic processing of the N-glycan shield. Here, we show that a cleavage-independent, stabilized, soluble Env trimer mimic (BG505 NFL.664) exhibits a "closed-form", native-like, prefusion conformation akin to furin-cleaved Env trimers. The crystal structure of BG505 NFL.664 at 3.39 Å resolution with two potent bNAbs also identifies the full epitopes of PGV19 and PGT122 that target the receptor binding site and N332 supersite, respectively. Quantitative site-specific analysis of the glycan shield reveals that native-like glycan processing is maintained despite furin-independent maturation in the secretory pathway. Thus, cleavage-independent NFL Env trimers exhibit quaternary protein and carbohydrate structures similar to the native viral spike that further validate their potential as vaccine immunogen candidates.

    Organizational Affiliation: 

    Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA, 92037, USA. wilson@scripps.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PGV19 Fab heavy chainA [auth D]223Homo sapiensMutation(s): 0 
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PGV19 light chainB [auth E]209Homo sapiensMutation(s): 0 
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Envelope glycoprotein gp140C [auth G]638Human immunodeficiency virus 1Mutation(s): 2 
Gene Names: env
UniProt
Find proteins for Q2N0S6 (Human immunodeficiency virus 1)
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Go to UniProtKB:  Q2N0S6
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UniProt GroupQ2N0S6
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
PGT122 Fab heavy chainD [auth H]235Homo sapiensMutation(s): 0 
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
PGT122 light chainE [auth L]213Homo sapiensMutation(s): 0 
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Oligosaccharides

Help

Entity ID: 6
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-3)-alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseF [auth A]7N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G07617FP
GlyCosmos:  G07617FP
GlyGen:  G07617FP
Entity ID: 7
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseG [auth B],
H [auth C]		3N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G15407YE
GlyCosmos:  G15407YE
GlyGen:  G15407YE
Entity ID: 8
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)-alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseI [auth F]8N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G81980VO
GlyCosmos:  G81980VO
GlyGen:  G81980VO
Entity ID: 9
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseJ [auth I],
O		5N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G22768VO
GlyCosmos:  G22768VO
GlyGen:  G22768VO
Entity ID: 10
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseK [auth J],
P,
R		2N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Entity ID: 11
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-mannopyranose-(1-6)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseL [auth K]4N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G22573RC
GlyCosmos:  G22573RC
GlyGen:  G22573RC
Entity ID: 12
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-6)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
M
8N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G48018RF
GlyCosmos:  G48018RF
GlyGen:  G48018RF
Entity ID: 13
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose
N
3N/A Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G25559RS
GlyCosmos:  G25559RS
GlyGen:  G25559RS
Entity ID: 14
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-3)]beta-D-mannopyranose
Q
4N/A Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G65169RI
GlyCosmos:  G65169RI
GlyGen:  G65169RI
Entity ID: 15
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
S
8N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G80966KZ
GlyCosmos:  G80966KZ
GlyGen:  G80966KZ
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.40 Å
  • R-Value Free: 0.346 
  • R-Value Work: 0.335 
  • R-Value Observed: 0.336 
  • Space Group: P 63
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 161.247α = 90
b = 161.247β = 90
c = 245.651γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-05-30
    Type: Initial release
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary