ISDA

Entry Detail

PDB ID:

6XRJ

Keywords:

Title:

Crystal structure of the disulfide linked DH717.1 Fab dimer, derived from a macaque HIV-1 vaccine-induced Env glycan-reactive neutralizing antibody B cell lineage

Biological Source:

Source Organism:

Homo sapiens

Host Organism:

Homo sapiens

PDB Version:

Deposition Date:

2020-07-13

Release Date:

2020-12-30

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

3.15 Å

R-Value Free:

0.28

R-Value Work:

0.24

R-Value Observed:

0.24

Space Group:

P 43 2 2

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Macromolecular Entities

Polymer Type:polypeptide(L)
Description:DH717.1 heavy chain Fab fragment
Chain IDs:A, C, E, G (auth: H)
Chain Length:226
Number of Molecules:4
Biological Source:Homo sapiens

Polymer Type:polypeptide(L)
Description:DH717.1 light chain Fab fragment
Chain IDs:B, D, F, H (auth: L)
Chain Length:211
Number of Molecules:4
Biological Source:Homo sapiens

Ligand Molecules

Primary Citation

Fab-dimerized glycan-reactive antibodies are a structural category of natural antibodies.

Williams, W.B, Meyerhoff, R.R, Edwards, R.J, Li, H, Manne, K, Nicely, N.I, Henderson, R, Zhou, Y, Janowska, K, Mansouri, K, Gobeil, S, Evangelous, T, Hora, B, Berry, M, Abuahmad, A.Y, Sprenz, J, Deyton, M, Stalls, V, Kopp, M, Hsu, A.L, Borgnia, M.J, Stewart-Jones, G.B.E, Lee, M.S, Bronkema, N, Moody, M.A, Wiehe, K, Bradley, T, Alam, S.M, Parks, R.J, Foulger, A, Oguin, T, Sempowski, G.D, Bonsignori, M, LaBranche, C.C, Montefiori, D.C, Seaman, M, Santra, S, Perfect, J, Francica, J.R, Lynn, G.M, Aussedat, B, Walkowicz, W.E, Laga, R, Kelsoe, G, Saunders, K.O, Fera, D, Kwong, P.D, Seder, R.A, Bartesaghi, A, Shaw, G.M, Acharya, P, Haynes, B.F, Acharya, P, Williams, W, Henderson, R, Janowska, K, Manne, K, Parks, R, Deyton, M, Sprenz, J, Stalls, V, Kopp, M, Mansouri, K, Edwards, R.J, Meyerhoff, R.R, Oguin, T, Sempowski, G, Saunders, K, Haynes, B.F.Show

Cell 184 2955 ? (2021)

PMID: 34019795 DOI: 10.1016/j.cell.2021.04.042

Abstact

Natural antibodies (Abs) can target host glycans on the surface of pathogens. We studied the evolution of glycan-reactive B cells of rhesus macaques and humans using glycosylated HIV-1 envelope (Env) as a model antigen. 2G12 is a broadly neutralizing Ab (bnAb) that targets a conserved glycan patch on Env of geographically diverse HIV-1 strains using a unique heavy-chain (VH) domain-swapped architecture that results in fragment antigen-binding (Fab) dimerization. Here, we describe HIV-1 Env Fab-dimerized glycan (FDG)-reactive bnAbs without VH-swapped domains from simian-human immunodeficiency virus (SHIV)-infected macaques. FDG Abs also recognized cell-surface glycans on diverse pathogens, including yeast and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike. FDG precursors were expanded by glycan-bearing immunogens in macaques and were abundant in HIV-1-naive humans. Moreover, FDG precursors were predominately mutated IgM+IgD+CD27+, thus suggesting that they originated from a pool of antigen-experienced IgM+ or marginal zone B cells.

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