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‘Camelising’ human antibody fragments: NMR studies on VH domains
Author(s) -
Davies Julian,
Riechmann Lutz
Publication year - 1994
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(94)80432-x
Subject(s) - chaps , chemistry , immunoglobulin light chain , relaxation (psychology) , nuclear magnetic resonance spectroscopy , proton nmr , biophysics , antibody , crystallography , stereochemistry , biochemistry , biology , genetics , neuroscience , membrane
A human heavy chain variable domain (VH) was expressed in bacteria for structural analysis by NMR spectroscopy. NMR analysis was initially impossible due to the short transverse proton relaxation time of the VH, probably caused by aggregation through the exposed interface naturally in contact with the light chain. The relaxation time was improved to normal values when this interface was mutated to mimic heavy chains of camel antibodies naturally devoid of light chains and through the use of the detergent CHAPS. Assignment of NMR signals will now be possible after isotopic labeling. Implications for the design of VH domains as minimum size immunoreagents are outlined.