An antibody with a variable-region coiled-coil "knob" domain.

An antibody with a variable-region coiled-coil "knob" domain.
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DOI:
10.1002/anie.201307939
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发表时间:
2014-01-03
影响因子:
16.6
通讯作者:
Schultz, Peter G.
Schultz, Peter G.
中科院分区:
化学1区
文献类型:
--
作者:
Zhang, Yong;Goswami, Devrishi;Wang, Danling;Wang, Tsung-Shing Andrew;Sen, Shiladitya;Magliery, Thomas J.;Griffin, Patrick R.;Wang, Feng;Schultz, Peter G.

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The X‐ray crystal structure of a bovine antibody (BLV1H12) revealed a unique structure in its ultralong heavy chain complementarity determining region 3 (CDR3H) that folds into a solvent‐exposed β‐strand “stalk” fused to a disulfide crosslinked “knob” domain. We have substituted an antiparallel heterodimeric coiled‐coil motif for the β‐strand stalk in this antibody. The resulting antibody (Ab‐coil) expresses in mammalian cells and has a stability similar to that of the parent bovine antibody. MS analysis of H–D exchange supports the coiled‐coil structure of the substituted peptides. Substitution of the knob‐domain of Ab‐coil with bovine granulocyte colony‐stimulating factor (bGCSF) results in a stably expressed chimeric antibody, which proliferates mouse NFS‐60 cells with a potency comparable to that of bGCSF. This work demonstrates the utility of this novel coiled‐coil CDR3 motif as a means for generating stable, potent antibody fusion proteins with useful pharmacological properties.
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