ISDA

Entry Detail

PDB ID:

1RZI

Keywords:

IMMUNE SYSTEM

Title:

Crystal structure of human anti-HIV-1 gp120-reactive antibody 47e fab

Biological Source:

Source Organism:

Homo sapiens

Host Organism:

Human herpesvirus 4

PDB Version:

Deposition Date:

2003-12-24

Release Date:

2004-02-03

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.90 Å

R-Value Free:

0.32

R-Value Work:

0.23

R-Value Observed:

0.23

Space Group:

P 1

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Macromolecular Entities

Polymer Type:polypeptide(L)
Description:Fab 47e light chain
Chain IDs:A, C, E, G, I, K, M, O
Chain Length:212
Number of Molecules:8
Biological Source:Homo sapiens

Polymer Type:polypeptide(L)
Description:Fab 47e heavy chain
Chain IDs:B, D, F, H, J, L, N, P
Chain Length:230
Number of Molecules:8
Biological Source:Homo sapiens

Primary Citation

Structural basis of tyrosine sulfation and VH-gene usage in antibodies that recognize the HIV type 1 coreceptor-binding site on gp120

Huang, C.C, Venturi, M, Majeed, S, Moore, M.J, Phogat, S, Zhang, M.-Y, Dimitrov, D.S, Hendrickson, W.A, Robinson, J, Sodroski, J, Wyatt, R, Choe, H, Farzan, M, Kwong, P.D.Show

Proc.Natl.Acad.Sci.USA 101 2706 2711 (2004)

PMID: 14981267 DOI: 10.1073/pnas.0308527100

Abstact

The conserved surface of the HIV-1 gp120 envelope glycoprotein that binds to the HIV-1 coreceptor is protected from humoral recognition by multiple layers of camouflage. Here we present sequence and genomic analyses for 12 antibodies that pierce these defenses and determine the crystal structures of 5. The data reveal mechanisms and atomic-level details for three unusual immune features: posttranslational mimicry of coreceptor by tyrosine sulfation of antibody, an alternative molecular mechanism controlling such sulfation, and highly selective V(H)-gene usage. When confronted by extraordinary viral defenses, the immune system unveils novel adaptive capabilities, with tyrosine sulfation enhancing the vocabulary of antigen recognition.

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