Carbohydrate-Polypeptide Contacts in the Antibody Receptor CD16A Identified through Solution NMR Spectroscopy.
Carbohydrate-Polypeptide Contacts in the Antibody Receptor CD16A Identified through Solution NMR Spectroscopy.
复制标题
通过溶液核磁共振波谱鉴定抗体受体 CD16A 中的碳水化合物-多肽接触。
DOI:
10.1021/acs.biochem.7b00392
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发表时间:
2017
期刊:
影响因子:
2.9
通讯作者:
Barb,AdamW
中科院分区:
文献类型:
--
作者:
Subedi,GaneshP;Falconer,DanielJ;Barb,AdamW
Asparagine-linked carbohydrates (N-glycans) are common modifications of eukaryotic proteins that confer multiple properties, including the essential stabilization of therapeutic monoclonal antibodies. Here we present a rapid and efficient strategy for identifying N-glycans that contact polypeptide residues and apply the method to profile the five N-glycans attached to the human antibody receptor CD16A (Fc γ receptor IIIA). Human embryonic kidney 293S cells expressed CD16A with13CU-labeled N-glycans using standard protein expression techniques and medium supplemented with 3 g/L [13CU]glucose. Anomeric resonances on the protein-linkedN-acetylglucosamine residue at the reducing end of the glycan are particularly well suited to studies of multiply glycosylated N-glycoproteins because only one reducing end and nitrogen-linked residue is present in each N-glycan. Correlations between anomeric1H1 and13C1 nuclei on the reducing end residue generate crosspeaks in a conventional two-dimensional heteronuclear single-quantum coherence nuclear magnetic resonance (NMR) experiment that appear in a region of the spectrum devoid of other carbohydrate peaks or background protein signals. Two N-glycan peaks corresponding to the N45 and N162 N-glycans were dispersed from the rapidly averaged peaks corresponding to the N38, N74, and N169 N-glycans. We used a combination of NMR and 1 μs all-atom computational simulations to identify unexpected contacts between the N45 N-glycan and CD16A polypeptide residues.
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影响因子:
16.8
作者:
Johnson JL;Jones MB;Ryan SO;Cobb BA
通讯作者:
Cobb BA
DOI:
10.1016/j.str.2015.06.015
发表时间:
2015-09-01
期刊:
Structure (London, England : 1993)
影响因子:
--
作者:
Subedi GP;Barb AW
通讯作者:
Barb AW
影响因子:
1.2
作者:
Subedi, Ganesh P.;Johnson, Roy W.;Barb, Adam
通讯作者:
Barb, Adam
影响因子:
6.8
作者:
Kim, Jung-Ja P.;Olson, Linda J.;Dahms, Nancy M.
通讯作者:
Dahms, Nancy M.
影响因子:
2.9
作者:
Barb AW;Meng L;Gao Z;Johnson RW;Moremen KW;Prestegard JH
通讯作者:
Prestegard JH