title: Structural Basis of Specific Recognition of Non-Reducing Terminal N-Acetylglucosamine by an Agrocybe aegerita Lectin.
abstract: O-linked N-acetylglucosaminylation (O-GlcNAcylation) is a reversible post-translational modification that plays essential roles in many cellular pathways. Research in this field, however, is hampered by the lack of suitable probes to identify, accumulate, and purify the O-GlcNAcylated proteins. We have previously reported the identification of a lectin from the mushroom Agrocybe aegerita, i.e., Agrocybe aegerita lectin 2, or AAL2, that could bind terminal N-acetylglucosamine with higher affinities and specificity than other currently used probes. In this paper, we report the crystal structures of AAL2 and its complexes with GlcNAc and GlcNAcβ1-3Galβ1-4GlcNAc and reveal the structural basis of GlcNAc recognition by AAL2 and residues essential for the binding of terminal N-acetylglucosamine. Study on AAL2 may enable us to design a protein probe that can be used to identify and purify O-GlcNAcylated proteins more efficiently.
authors.affiliation: National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing, 100101, People's Republic of China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, People's Republic of China.
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Ren
authors.affiliation: National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing, 100101, People's Republic of China.
authors.forename: De-Feng
authors.initials: DF
authors.lastname: Li
authors.affiliation: College of Life Sciences, Wuhan University, Wuhan, 430072, People's Republic of China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Jiang
authors.affiliation: College of Life Sciences, Wuhan University, Wuhan, 430072, People's Republic of China.
authors.forename: Xian-Qing
authors.initials: XQ
authors.lastname: Lan
authors.affiliation: National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing, 100101, People's Republic of China.
authors.forename: Yonglin
authors.initials: Y
authors.lastname: Hu
authors.affiliation: College of Life Sciences, Wuhan University, Wuhan, 430072, People's Republic of China.
authors.forename: Hui
authors.initials: H
authors.lastname: Sun
authors.affiliation: National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing, 100101, People's Republic of China.
authors.forename: Da-Cheng
authors.initials: DC
authors.lastname: Wang
mesh_terms: D000117:Acetylglucosamine / Q000737:chemistry* / Q000378:metabolism; D055362:Agrocybe / Q000378:metabolism*; D000595:Amino Acid Sequence; D001665:Binding Sites; D006031:Glycosylation; D037102:Lectins / Q000737:chemistry* / Q000378:metabolism; D008670:Metals / Q000737:chemistry / Q000378:metabolism; D008958:Models, Molecular; D008969:Molecular Sequence Data; D011134:Polysaccharides / Q000737:chemistry / Q000378:metabolism; D011485:Protein Binding; D011487:Protein Conformation; D016415:Sequence Alignment; D013329:Structure-Activity Relationship; D013379:Substrate Specificity; D020349:Surface Plasmon Resonance
chemical_list: D037102:Lectins; D008670:Metals; D011134:Polysaccharides; D000117:Acetylglucosamine