5ERD

Crystal structure of human Desmoglein-2 ectodomain

5ERD の概要

• エントリーDOI: 10.2210/pdb5erd/pdb
• 関連するPDBエントリー: 5EQX 5ERP
• 分子名称: Desmoglein-2, beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose, beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose, ... (9 entities in total)
• 機能のキーワード: extracellular cadherin domain, cell adhesion, desmosome, cell surface
• 由来する生物種: Homo sapiens (Human)
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 131621.94

構造登録者

Brasch, J.,Harrison, O.J.,Shapiro, L. (登録日: 2015-11-13, 公開日: 2016-06-22, 最終更新日: 2024-11-06)

主引用文献

Harrison, O.J.,Brasch, J.,Lasso, G.,Katsamba, P.S.,Ahlsen, G.,Honig, B.,Shapiro, L.
Structural basis of adhesive binding by desmocollins and desmogleins.
Proc.Natl.Acad.Sci.USA, 113:7160-7165, 2016

PubMed Abstract: Desmosomes are intercellular adhesive junctions that impart strength to vertebrate tissues. Their dense, ordered intercellular attachments are formed by desmogleins (Dsgs) and desmocollins (Dscs), but the nature of trans-cellular interactions between these specialized cadherins is unclear. Here, using solution biophysics and coated-bead aggregation experiments, we demonstrate family-wise heterophilic specificity: All Dsgs form adhesive dimers with all Dscs, with affinities characteristic of each Dsg:Dsc pair. Crystal structures of ectodomains from Dsg2 and Dsg3 and from Dsc1 and Dsc2 show binding through a strand-swap mechanism similar to that of homophilic classical cadherins. However, conserved charged amino acids inhibit Dsg:Dsg and Dsc:Dsc interactions by same-charge repulsion and promote heterophilic Dsg:Dsc interactions through opposite-charge attraction. These findings show that Dsg:Dsc heterodimers represent the fundamental adhesive unit of desmosomes and provide a structural framework for understanding desmosome assembly.

PubMed: 27298358
DOI: 10.1073/pnas.1606272113

実験手法

X-RAY DIFFRACTION (2.9 Å)