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• 8ANC131: A novel CD4bs bNAb, 1-18, is identified with breadth (97% against a 119-strain multiclade panel) and potency exceeding (IC₅₀ = 0.048 µg/mL) most V_H1-46 and V_H1-2 class bNAbs like 3BNC117, VRC01, N6, 8ANC131, 10-1074, PGT151, PGT121, 8ANC195, PG16 and PGDM1400. 1-18 effectively restricts viral escape better than bNAbs 3BNC117 and VRC01. While 1-18 targets the CD4bs like VRC01-like Abs, it recognizes the epitope differently. Neutralizing activity against VRC01 Ab-class escapes is maintained by 1-18. In humanized mice infected by strain 1_YU2, viral suppression is also maintained by 1-18. V_H1-46-derived B cell clone 4.1 from patient IDC561 produced potent, broadly active Abs. Subclone 4.1 is characterized by a 6 aa CDRH1 insertion lengthening it from 8 to 14 aa. and produces bNAbs 1-18 and 1-55. Cryo-EM at 2.5A of 1-18 in complex with BG505_SOSIP.664 suggests their insertion increases inter-protomer contacts by a negatively charged DDDPYTDDD motif, resulting in an enlargement of the buried surface on HIV-1 gp120. Variations in glycosylation is thought to confer higher neutralizing activity on 1-18 over 1-55. Schommers2020 (antibody binding site, antibody generation, antibody interactions, neutralization, escape, binding affinity, antibody sequence, structure, broad neutralizer, contact residues)
• 8ANC131: This study demonstrated that bNAb signatures can be utilized to engineer HIV-1 Env vaccine immunogens eliciting Ab responses with greater neutralization breadth. Data from four large virus panels were used to comprehensively map viral signatures associated with bNAb sensitivity, hypervariable region characteristics, and clade effects. The bNAb signatures defined for the V2 epitope region were then employed to inform immunogen design in a proof-of-concept exploration of signature-based epitope targeted (SET) vaccines. V2 bNAb signature-guided mutations were introduced into Env 459C to create a trivalent vaccine which resulted in increased breadth of NAb responses compared with Env 459C alone. 8ANC131 was used for structural mapping and analyses of CD4bs signatures. Bricault2019 (antibody binding site, vaccine antigen design, computational epitope prediction, broad neutralizer)
• 8ANC131: This review discusses the identification of super-Abs, where and how such Abs may be best applied and future directions for the field. 8ANC131 was isolated from human B cell clones and is functionally similar to VRC01. Antigenic region CD4 binding site (Table:1). Walker2018 (antibody binding site, review, broad neutralizer)
• 8ANC131: Novel bNAb, IOMA, combines features of VH_1-2/VRC01-class bNAbs with CD4-mimetic CD4bs bNAbs. It is described in complex to BG505 SOSIP.664 Env trimer by 3.5A and 3.9A-resolution crystal structures. The IOMA-BG505 structure demonstrates that VH1-2*02-derived CD4-mimetic bNAbs are not limited to longer, five-residue CDRL3s as in the case of VRC01. This is the first full description of native glycosylated trimer (untrimmed high-mannose and complex-typle N-glycans) revealing Ab-vulnerable glycan holes. Though derived from VRC01, the shorter CDRL3 makes IOMA resemble am 8ANC131-class/VH1-46-derived CD4bs bNAb. The Env binding orientation of IOMA differed from the orientations of VH1-46/8ANC131-class bNAbs. 8ANC131-like bNAbs use their normal-length CDRL3s in place of a W100B HC residue to interact with N279 gp120 /N280 gp120. IOMA is unique in having both an N279 gp120 /N280 gp120-W100F_HC interaction and a normal-length CDRL3, a combination made possible because its CDRL3 is displaced from gp120 loop D and toward the V5 loop. Gristick2016 (glycosylation)
• 8ANC131: This study investigated the ability of native, membrane-expressed JR-FL Env trimers to elicit NAbs. Rabbits were immunized with virus-like particles (VLPs) expressing trimers (trimer VLP sera) and DNA expressing native Env trimer, followed by a protein boost (DNA trimer sera). N197 glycan- and residue 230- removal conferred sensitivity to Trimer VLP sera and DNA trimer sera respectively, showing for the first time that strain-specific holes in the "glycan fence" can allow the development of tier 2 NAbs to native spikes. All 3 sera neutralized via quaternary epitopes and exploited natural gaps in the glycan defenses of the second conserved region of JR-FL gp120. VRC01 was 1 of 4 reference VRC01-like bNAbs - VRC01, 3BNC117, 8ANC131, CH103. Crooks2015 (glycosylation, neutralization)
• 8ANC131: This review classified and mapped the binding regions of 32 bNAbs isolated 2010-2016. Wu2016 (review)
• 8ANC131: This study produced Env SOSIP trimers for clades A (strain BG505), B (strain JR-FL), and G (strain X1193). Based on simulations, the MAb-trimer structures of all MAbs tested needed to accommodate at least one glycan, including both antibodies known to require specific glycans (PG9, PGT121, PGT135, 8ANC195, 35O22) and those that bind the CD4-binding site (b12, CH103, HJ16, VRC01, VRC13). A subset of monoclonal antibodies bound to glycan arrays assayed on glass slides (VRC26.09, PGT121, 2G12, PGT128, VRC13, PGT151, 35O22), while most of the antibodies did not have affinity for oligosaccharide in the context of a glycan array (PG9, PGT145, PGDM1400, PGT135, b12, CH103, HJ16, VRC16, VRC01, VRC-PG04, VRC-CH31, VRC-PG20, 3BNC60, 12A12, VRC18b, VRC23, VRC27, 1B2530, 8ANC131, 8ANC134, 8ANC195). Stewart-Jones2016 (antibody binding site, glycosylation, structure)
• 8ANC131: This study isolated 4 novel antibodies that bind the CD4 binding site of Env. Population-level analysis classified a diverse group of CD4bs antibodies into two types: CDR H3-dominated or VH-gene-restricted, each with distinct ontogenies. Structural data revealed that neutralization breadth was correlated with angle of approach of the antibodies to the CD4 binding region. 8ANC131 was one of the antibodies in the VH gene restricted, 8ANC131-like class. Zhou2015 (neutralization, structure, antibody lineage, broad neutralizer)
• 8ANC131: CD4-binding site Abs are reviewed. New insights from donor-serum responses, atomic-level structures of antibody-Env complexes, and next-generation sequencing of B-cell transcripts are invigorating vaccine-design efforts to elicit effective CD4-binding site Abs. Analysis of the epitopes recognized by CD4-binding Abs reveals substantial similarity in the recognized region of gp120. 8ANC131 is a VH1-46-germ-line derived Ab and recognizes gp120 in a manner similar to that of the VRC01-class. Georgiev2013a (review)
• 8ANC131: This is a review of identified bNAbs, including the ontogeny of B cells that give rise to these antibodies. Breadth and magnitude of neutralization, unique features and similar bNAbs are listed. 8ANC131 is a CD4bs Ab, with breadth 57%, IC₅₀ 4.02 μg per ml, and its unique feature is CD4 mimicry by its VH1-46-derived heavy chain. Similar MAbs include 8ANC37 and 8ANC134. Kwong2013 (review)
• 8ANC131: A computational method to predict Ab epitopes at the residue level, based on structure and neutralization panels of diverse viral strains has been described. This method was evaluated using 19 Env-Abs, , against 181 diverse HIV-1 strains with available Ab-Ag complex structures. Among the top 10 predicted epitope residues for 8ANC131, only 456, 280, 96, 282 and 461 from region 1 were experimentally validated as part of the actual Ab epitope. Chuang2013 (computational epitope prediction, structure)
• 8ANC131: "Neutralization fingerprints" for 30 neutralizing antibodies were determined using a panel of 34 diverse HIV-1 strains. 10 antibody clusters were defined: VRC01-like, PG9-like, PGT128-like, 2F5-like, 10E8-like and separate clusters for b12, CD4, 2G12, HJ16, 8ANC195. This mAb belongs to VRC01-like cluster. Georgiev2013 (neutralization)
• 8ANC131: Identification of broadly neutralizing antibodies, their epitopes on the HIV-1 spike, the molecular basis for their remarkable breadth, and the B cell ontogenies of their generation and maturation are reviewed. Ontogeny and structure-based classification is presented, based on MAb binding site, type (structural mode of recognition), class (related ontogenies in separate donors) and family (clonal lineage). This MAb's classification: gp120 CD4-binding site, CD4-mimicry by heavy chain, 8ANC131 class, 8ANC131 family. Kwong2012 (review, structure, broad neutralizer)
• 8ANC131: Somatic hypermutations are preferably found in CDR loops, which alter the Ab combining sites, but not the overall structure of the variable domain. FWR of CDR are usually resistant to and less tolerant of mutations. This study reports that most bnAbs require somatic mutations in the FWRs which provide flexibility, increasing Ab breadth and potency. To determine the consequence of FWR mutations the framework residues were reverted to the Ab's germline counterpart (FWR-GL) and binding and neutralizing properties were then evaluated. 8ANC131, a CD4bs Ab, was among the 17 bnAbs which were used in studying the mutations in FWR. Klein2013 (neutralization, structure, antibody lineage)
• 8ANC131: This study shows that Env immunogens fail to engage the germline-reverted forms of known bnAbs that target CD4BS. However, the elimination of a conserved NLGS at Asn276 in Loop D and the NLGS at positions 460 and 463, located in variable region 5 of Env increased the binding and activation of VRC01 and NIH45-46. 8ANC131 was referred to as anti-CD4BS bnAbs. McGuire2013 (neutralization, antibody lineage)
• 8ANC131: Existing structural and sequence data was analyzed. A set of signature features for potent VRC01-like (PVL) and almost PVL abs was proposed and verified by mutagenesis. VRC-CH31 has been referred in discussing the breadth and potency of antiCD4 abs. West2012a (antibody lineage)
• 8ANC131: 576 new HIV antibodies were cloned from 4 unrelated individuals producing expanded clones of potent broadly neutralizing CD4bs antibodies that bind to 2CC core. In order to amplify highly somatically mutated immunoglobulin genes, new primer set with 5' primer set further upstream from the potentially mutated region was used. Despite extensive hypermutation, the new antibodies shared a consensus sequence of 68 IgH chain amino acids and arose independently from two related IgH genes. 8ANC131 arises from IgVH1-46 and IgVK3-11 germline genes and neutralized 7/15 isolates from major clades, with IC50<50μg/ml, but none of the 5 VRC01-resistant isolates. 8ANC131 is polyreactive - reacted with dsDNA, LPS, but not with ssDNA or insulin. Scheid2011 (antibody generation, neutralization, antibody sequence, antibody polyreactivity)

References

Showing 17 of 17 references.

Isolation Paper
Scheid2011 Johannes F. Scheid, Hugo Mouquet, Beatrix Ueberheide, Ron Diskin, Florian Klein, Thiago Y. K. Oliveira, John Pietzsch, David Fenyo, Alexander Abadir, Klara Velinzon, Arlene Hurley, Sunnie Myung, Farid Boulad, Pascal Poignard, Dennis R. Burton, Florencia Pereyra, David D. Ho, Bruce D. Walker, Michael S. Seaman, Pamela J. Bjorkman, Brian T. Chait, and Michel C. Nussenzweig. Sequence and Structural Convergence of Broad and Potent HIV Antibodies That Mimic CD4 Binding. Science, 333(6049):1633-1637, 16 Sep 2011. PubMed ID: 21764753. Show all entries for this paper.

Chuang2013 Gwo-Yu Chuang, Priyamvada Acharya, Stephen D. Schmidt, Yongping Yang, Mark K. Louder, Tongqing Zhou, Young Do Kwon, Marie Pancera, Robert T. Bailer, Nicole A. Doria-Rose, Michel C. Nussenzweig, John R. Mascola, Peter D. Kwong, and Ivelin S. Georgiev. Residue-Level Prediction of HIV-1 Antibody Epitopes Based on Neutralization of Diverse Viral Strains. J. Virol., 87(18):10047-10058, Sep 2013. PubMed ID: 23843642. Show all entries for this paper.

Georgiev2013 Ivelin S. Georgiev, Nicole A. Doria-Rose, Tongqing Zhou, Young Do Kwon, Ryan P. Staupe, Stephanie Moquin, Gwo-Yu Chuang, Mark K. Louder, Stephen D. Schmidt, Han R. Altae-Tran, Robert T. Bailer, Krisha McKee, Martha Nason, Sijy O'Dell, Gilad Ofek, Marie Pancera, Sanjay Srivatsan, Lawrence Shapiro, Mark Connors, Stephen A. Migueles, Lynn Morris, Yoshiaki Nishimura, Malcolm A. Martin, John R. Mascola, and Peter D. Kwong. Delineating Antibody Recognition in Polyclonal Sera from Patterns of HIV-1 Isolate Neutralization. Science, 340(6133):751-756, 10 May 2013. PubMed ID: 23661761. Show all entries for this paper.

Georgiev2013a Ivelin S. Georgiev, M. Gordon Joyce, Tongqing Zhou, and Peter D. Kwong. Elicitation of HIV-1-Neutralizing Antibodies against the CD4-Binding Site. Curr. Opin. HIV AIDS, 8(5):382-392, Sep 2013. PubMed ID: 23924998. Show all entries for this paper.

Klein2013 Florian Klein, Ron Diskin, Johannes F. Scheid, Christian Gaebler, Hugo Mouquet, Ivelin S. Georgiev, Marie Pancera, Tongqing Zhou, Reha-Baris Incesu, Brooks Zhongzheng Fu, Priyanthi N. P. Gnanapragasam, Thiago Y. Oliveira, Michael S. Seaman, Peter D. Kwong, Pamela J. Bjorkman, and Michel C. Nussenzweig. Somatic Mutations of the Immunoglobulin Framework Are Generally Required for Broad and Potent HIV-1 Neutralization. Cell, 153(1):126-138, 28 Mar 2013. PubMed ID: 23540694. Show all entries for this paper.

Kwong2012 Peter D. Kwong and John R. Mascola. Human Antibodies that Neutralize HIV-1: Identification, Structures, and B Cell Ontogenies. Immunity, 37(3):412-425, 21 Sep 2012. PubMed ID: 22999947. Show all entries for this paper.

Kwong2013 Peter D. Kwong, John R. Mascola, and Gary J. Nabel. Broadly Neutralizing Antibodies and the Search for an HIV-1 Vaccine: The End of the Beginning. Nat. Rev. Immunol., 13(9):693-701, Sep 2013. PubMed ID: 23969737. Show all entries for this paper.

McGuire2013 Andrew T. McGuire, Sam Hoot, Anita M. Dreyer, Adriana Lippy, Andrew Stuart, Kristen W. Cohen, Joseph Jardine, Sergey Menis, Johannes F. Scheid, Anthony P. West, William R. Schief, and Leonidas Stamatatos. Engineering HIV Envelope Protein To Activate Germline B Cell Receptors of Broadly Neutralizing Anti-CD4 Binding Site Antibodies. J. Exp. Med., 210(4):655-663, 8 Apr 2013. PubMed ID: 23530120. Show all entries for this paper.

West2012a Anthony P. West, Jr., Ron Diskin, Michel C. Nussenzweig, and Pamela J. Bjorkman. Structural Basis for Germ-Line Gene Usage of a Potent Class of Antibodies Targeting the CD4-Binding Site of HIV-1 gp120. Proc. Natl. Acad. Sci. U.S.A., 109(30):E2083-E2090, 24 Jul 2012. PubMed ID: 22745174. Show all entries for this paper.

Zhou2015 Tongqing Zhou, Rebecca M. Lynch, Lei Chen, Priyamvada Acharya, Xueling Wu, Nicole A. Doria-Rose, M. Gordon Joyce, Daniel Lingwood, Cinque Soto, Robert T. Bailer, Michael J. Ernandes, Rui Kong, Nancy S. Longo, Mark K. Louder, Krisha McKee, Sijy O'Dell, Stephen D. Schmidt, Lillian Tran, Zhongjia Yang, Aliaksandr Druz, Timothy S. Luongo, Stephanie Moquin, Sanjay Srivatsan, Yongping Yang, Baoshan Zhang, Anqi Zheng, Marie Pancera, Tatsiana Kirys, Ivelin S. Georgiev, Tatyana Gindin, Hung-Pin Peng, An-Suei Yang, NISC Comparative Sequencing Program, James C. Mullikin, Matthew D. Gray, Leonidas Stamatatos, Dennis R. Burton, Wayne C. Koff, Myron S. Cohen, Barton F. Haynes, Joseph P. Casazza, Mark Connors, Davide Corti, Antonio Lanzavecchia, Quentin J. Sattentau, Robin A. Weiss, Anthony P. West, Jr., Pamela J. Bjorkman, Johannes F. Scheid, Michel C. Nussenzweig, Lawrence Shapiro, John R. Mascola, and Peter D. Kwong. Structural Repertoire of HIV-1-Neutralizing Antibodies Targeting the CD4 Supersite in 14 Donors. Cell, 161(6):1280-1292, 4 Jun 2015. PubMed ID: 26004070. Show all entries for this paper.

Stewart-Jones2016 Guillaume B. E. Stewart-Jones, Cinque Soto, Thomas Lemmin, Gwo-Yu Chuang, Aliaksandr Druz, Rui Kong, Paul V. Thomas, Kshitij Wagh, Tongqing Zhou, Anna-Janina Behrens, Tatsiana Bylund, Chang W. Choi, Jack R. Davison, Ivelin S. Georgiev, M. Gordon Joyce, Young Do Kwon, Marie Pancera, Justin Taft, Yongping Yang, Baoshan Zhang, Sachin S. Shivatare, Vidya S. Shivatare, Chang-Chun D. Lee, Chung-Yi Wu, Carole A. Bewley, Dennis R. Burton, Wayne C. Koff, Mark Connors, Max Crispin, Ulrich Baxa, Bette T. Korber, Chi-Huey Wong, John R. Mascola, and Peter D. Kwong. Trimeric HIV-1-Env Structures Define Glycan Shields from Clades A, B, and G. Cell, 165(4):813-826, 5 May 2016. PubMed ID: 27114034. Show all entries for this paper.

Wu2016 Xueling Wu and Xiang-Peng Kong. Antigenic Landscape of the HIV-1 Envelope and New Immunological Concepts Defined by HIV-1 Broadly Neutralizing Antibodies. Curr. Opin. Immunol., 42:56-64, Oct 2016. PubMed ID: 27289425. Show all entries for this paper.

Crooks2015 Ema T. Crooks, Tommy Tong, Bimal Chakrabarti, Kristin Narayan, Ivelin S. Georgiev, Sergey Menis, Xiaoxing Huang, Daniel Kulp, Keiko Osawa, Janelle Muranaka, Guillaume Stewart-Jones, Joanne Destefano, Sijy O'Dell, Celia LaBranche, James E. Robinson, David C. Montefiori, Krisha McKee, Sean X. Du, Nicole Doria-Rose, Peter D. Kwong, John R. Mascola, Ping Zhu, William R. Schief, Richard T. Wyatt, Robert G. Whalen, and James M. Binley. Vaccine-Elicited Tier 2 HIV-1 Neutralizing Antibodies Bind to Quaternary Epitopes Involving Glycan-Deficient Patches Proximal to the CD4 Binding Site. PLoS Pathog, 11(5):e1004932, May 2015. PubMed ID: 26023780. Show all entries for this paper.

Gristick2016 Harry B. Gristick, Lotta von Boehmer, Anthony P. West, Jr., Michael Schamber, Anna Gazumyan, Jovana Golijanin, Michael S. Seaman, Gerd Fätkenheuer, Florian Klein, Michel C. Nussenzweig, and Pamela J. Bjorkman. Natively Glycosylated HIV-1 Env Structure Reveals New Mode for Antibody Recognition of the CD4-Binding Site. Nat. Struct. Mol. Biol., 23(10):906-915, Oct 2016. PubMed ID: 27617431. Show all entries for this paper.

Walker2018 Laura M. Walker and Dennis R. Burton. Passive Immunotherapy of Viral Infections: `Super-Antibodies' Enter the Fray. Nat. Rev. Immunol., 18(5):297-308, May 2018. PubMed ID: 29379211. Show all entries for this paper.

Bricault2019 Christine A. Bricault, Karina Yusim, Michael S. Seaman, Hyejin Yoon, James Theiler, Elena E. Giorgi, Kshitij Wagh, Maxwell Theiler, Peter Hraber, Jennifer P. Macke, Edward F. Kreider, Gerald H. Learn, Beatrice H. Hahn, Johannes F. Scheid, James M. Kovacs, Jennifer L. Shields, Christy L. Lavine, Fadi Ghantous, Michael Rist, Madeleine G. Bayne, George H. Neubauer, Katherine McMahan, Hanqin Peng, Coraline Chéneau, Jennifer J. Jones, Jie Zeng, Christina Ochsenbauer, Joseph P. Nkolola, Kathryn E. Stephenson, Bing Chen, S. Gnanakaran, Mattia Bonsignori, LaTonya D. Williams, Barton F. Haynes, Nicole Doria-Rose, John R. Mascola, David C. Montefiori, Dan H. Barouch, and Bette Korber. HIV-1 Neutralizing Antibody Signatures and Application to Epitope-Targeted Vaccine Design. Cell Host Microbe, 25(1):59-72.e8, 9 Jan 2019. PubMed ID: 30629920. Show all entries for this paper.

Schommers2020 Philipp Schommers, Henning Gruell, Morgan E. Abernathy, My-Kim Tran, Adam S. Dingens, Harry B. Gristick, Christopher O. Barnes, Till Schoofs, Maike Schlotz, Kanika Vanshylla, Christoph Kreer, Daniela Weiland, Udo Holtick, Christof Scheid, Markus M. Valter, Marit J. van Gils, Rogier W. Sanders, Jörg J. Vehreschild, Oliver A. Cornely, Clara Lehmann, Gerd Fätkenheuer, Michael S. Seaman, Jesse D. Bloom, Pamela J. Bjorkman, and Florian Klein. Restriction of HIV-1 Escape by a Highly Broad and Potent Neutralizing Antibody. Cell, 180(3):471-489.e22, 6 Feb 2020. PubMed ID: 32004464. Show all entries for this paper.