Conservation and diversity in the ultralong third heavy-chain complementarity-determining region of bovine antibodies
Journal Article
·
· Science Immunology
- The Scripps Research Inst., La Jolla, CA (United States)
- The Scripps Research Inst., La Jolla, CA (United States); Fabrus Inc., San Diego, CA (United States)
Antibodies provide a broad defense against a vast array of antigens; however, the structural features that contribute to this diverse antigen recognition vary in different vertebrates. In cows, a subset of antibodies have an exceptionally long third heavy-chain complementarity-determining region (CDR H3) that is highly variable in sequence and includes multiple cysteines. These long CDR H3s (up to 69 residues) fold into a long stalk atop which sits a knob domain that is located far from the antibody surface. We have determined crystal structures of three bovine Fabs to decipher the conserved and variable features of ultralong CDR H3s that lead to diversity in antigen recognition. Despite high sequence variability, the stalks adopt a conserved β-ribbon structure, whereas the knob regions share a conserved β sheet that serves as a scaffold for two connecting loops of variable length and conformation, as well as one conserved disulfide. Variation in patterns and connectivity of the remaining disulfides contribute to the structural diversity of the knob. Finally, the unusual architecture of these ultralong bovine CDR H3s for generating diversity is unique in adaptive immune systems and may inform efforts in antibody engineering.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- National Institutes of Health (NIH); USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1368222
- Journal Information:
- Science Immunology, Journal Name: Science Immunology Journal Issue: 1 Vol. 1; ISSN 2470-9468
- Publisher:
- AAASCopyright Statement
- Country of Publication:
- United States
- Language:
- ENGLISH
Structural Diversity of Ultralong CDRH3s in Seven Bovine Antibody Heavy Chains
|
journal | March 2019 |
Contributions of Farm Animals to Immunology
|
journal | December 2018 |
Immunogenetic factors driving formation of ultralong VH CDR3 in Bos taurus antibodies
|
journal | December 2017 |
Formation of ultralong DH regions through genomic rearrangement
|
journal | June 2020 |
Similar Records
The smallest functional antibody fragment: Ultralong CDR H3 antibody knob regions potently neutralize SARS-CoV-2
Structural Diversity of Ultralong CDRH3s in Seven Bovine Antibody Heavy Chains
Journal Article
·
Sun Sep 17 20:00:00 EDT 2023
· Proceedings of the National Academy of Sciences of the United States of America
·
OSTI ID:2423701
Structural Diversity of Ultralong CDRH3s in Seven Bovine Antibody Heavy Chains
Journal Article
·
Thu Mar 21 20:00:00 EDT 2019
· Frontiers in Immunology
·
OSTI ID:1503947