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Displaying record number 2069

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MAb ID	3792
HXB2 Location	Env	Env Epitope Map
Author Location	gp120 (V3)
Epitope
Subtype	C
Ab Type	gp120 V3 // V3 glycan (V3g)
Neutralizing
Species (Isotype)	human(IgG1λ)
Patient
Immunogen	HIV-1 infection
Country	India
Keywords	antibody generation, antibody sequence, binding affinity, mimotopes, structure, vaccine antigen design

Notes

Showing 3 of 3 notes.

3792: VH5-51 gene segment was used by 18 of 51 (35%) anti-V3 MAbs. This study analyzed the crystal structure of 5 Fabs encoded by VH5-51/VL lambda genes. Each Fab interacted with key residues at the same 7 positions in the crown of the V3 loop, although the amino acids could vary, suggesting that while V3 is variable in sequence and structurally flexible, a common structure is retained across strains. All 18 VH5-51 using MAbs were studied with a constrained peptide mimotope which preserved the 3D of the VH5-51 derived MAbs 2219, 2557, 1006, but did not react with other anti-V3 MAbs that recognize different V3 epitopes. 14/18 (this MAb included) were reactive with the mimotope, compared to only 1/30 non-VH5-51 MAbs. Gorny2011 (mimotopes, antibody sequence, structure)
3792: Two V3-scaffold immunogen constructs were designed and expressed using 3D structures of cholera toxin B (CTB), V3 in the gp120 context, and V3 bound to 447-52D MAb. The construct (V3-CTB) presenting the complete V3 was recognized by 3792 MAb and by the large majority of other MAbs (18/24), indicating correctly folded and exposed MAb epitopes. V3-CTB induced V3-binding Abs and Abs displaying cross-clade neutralizing activity in immunized rabbits. Short V3-CTB construct, presenting a V3 fragment in conformation observed in complex with 447-52D, was not recognized by 3792. Totrov2010 (vaccine antigen design, binding affinity, structure)
3792: This Ab was derived from one of 12 individuals infected with non-B subtypes from Cameroon and India. The Ig usage for variable heavy chain of this Ab was as follows: IGHV:5-51*03, IGHD:3-22, D-RF:2, IGHJ:4. There was a preferential usage of the VH5-51 gene segment for V3 Abs. The usage of the VH4 family for the V3 Abs was restricted to only one gene segment, VH4-59, and the VH3 gene family was used at a significantly lower level by these Abs. The V3 Abs preferentially used the JH3 and D2-15 gene segments. Gorny2009 (antibody generation, antibody sequence)

References

Showing 3 of 3 references.

Isolation Paper
Gorny2009 Miroslaw K. Gorny, Xiao-Hong Wang, Constance Williams, Barbara Volsky, Kathy Revesz, Bradley Witover, Sherri Burda, Mateusz Urbanski, Phillipe Nyambi, Chavdar Krachmarov, Abraham Pinter, Susan Zolla-Pazner, and Arthur Nadas. Preferential Use of the VH5-51 Gene Segment by the Human Immune Response to Code for Antibodies against the V3 Domain of HIV-1. Mol. Immunol., 46(5):917-926, Feb 2009. PubMed ID: 18952295. Show all entries for this paper.

Totrov2010 Maxim Totrov, Xunqing Jiang, Xiang-Peng Kong, Sandra Cohen, Chavdar Krachmarov, Aidy Salomon, Constance Williams, Michael S. Seaman, Ruben Abagyan, Timothy Cardozo, Miroslaw K. Gorny, Shixia Wang, Shan Lu, Abraham Pinter, and Susan Zolla-Pazner. Structure-Guided Design and Immunological Characterization of Immunogens Presenting the HIV-1 gp120 V3 Loop on a CTB Scaffold. Virology, 405(2):513-523, 30 Sep 2010. PubMed ID: 20663531. Show all entries for this paper.

Gorny2011 Miroslaw K. Gorny, Jared Sampson, Huiguang Li, Xunqing Jiang, Maxim Totrov, Xiao-Hong Wang, Constance Williams, Timothy O'Neal, Barbara Volsky, Liuzhe Li, Timothy Cardozo, Phillipe Nyambi, Susan Zolla-Pazner, and Xiang-Peng Kong. Human Anti-V3 HIV-1 Monoclonal Antibodies Encoded by the VH5-51/VL Lambda Genes Define a Conserved Antigenic Structure. PLoS One, 6(12):e27780, 2011. PubMed ID: 22164215. Show all entries for this paper.