1SQ0: PDB entry 1SQ0

Crystal Structure of the Complex of the Wild-type Von Willebrand Factor A1 domain and Glycoprotein Ib alpha at 2.6 Angstrom Resolution. Determined by X-ray diffraction at 2.6 Å resolution. Released 13 Apr 2004.

Method
X-ray diffraction
Resolution
2.6 Å
Organism
Homo sapiens
Chains
2
Atoms
3,982
Mol. weight
56.55 kDa
Released
13 Apr 2004

Explore 1SQ0 in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

1SQ0 contains 17 α-helices and 28 β-strands across 2 chains. Residue ranges use author residue numbering, as in the PDB file, from PDBe. To see them in 3D, choose the Cartoon representation with Secondary structure coloring: helices, sheets and coils get different colors.

Chain A: 11 helices, 10 β-strands

ElementResiduesLengthSheet
β-strand51111
β-strand513-52082
β-strand52213
α-helix527-54317
β-strand551-55882
β-strand562-56652
α-helix574-58310
α-helix584-5863
β-strand58913
α-helix594-6007
α-helix601-6055
β-strand615-62282
α-helix628-6303
α-helix634-64310
β-strand646-65382
α-helix659-66810
β-strand675-67732
α-helix680-6823
α-helix687-6959
α-helix6991
β-strand70011
Chain B: 6 helices, 18 β-strands
ElementResiduesLengthSheet
β-strand5-952
β-strand12-1652
α-helix25-262
β-strand35-3732
β-strand45-4734
α-helix48-514
β-strand59-6132
β-strand69-7134
β-strand81-8332
β-strand104-10632
β-strand128-13032
β-strand152-15432
β-strand176-17832
β-strand199-20132
β-strand20715
α-helix211-2133
α-helix214-2229
β-strand227-23262
β-strand237-24152
α-helix243-2453
β-strand24716
β-strand24815
β-strand25516
α-helix256-2583

Molecules and chains

MoleculeChainsTypeLengthOrganismUniProt
Von Willebrand factor (vWF) [Contains: Von Willebrand antigen II]Aprotein214Homo sapiensP04275 (AlphaFold model)
Platelet glycoprotein Ib alpha chain (Glycoprotein Ibalpha) (GP-Ib alpha) (GPIbA) (GPIb-alpha)…Bprotein288Homo sapiensP07359 (AlphaFold model)
Sequence of entity 1 (A), FASTA
>1SQ0_1 Von Willebrand factor (vWF) [Contains: Von Willebrand antigen II] (chains A)
MEDISEPPLHDFYCSRLLDLVFLLDGSSRLSEAEFEVLKAFVVDMMERLRISQKWVRVAV
VEYHDGSHAYIGLKDRKRPSELRRIASQVKYAGSQVASTSEVLKYTLFQIFSKIDRPEAS
RIALLLMASQEPQRMSRNFVRYVQGLKKKKVIVIPVGIGPHANLKQIRLIEKQAPENKAF
VLSSVDELEQQRDEIVSYLCDLAPEAPPPTLPPH
Sequence of entity 2 (B), FASTA
>1SQ0_2 Platelet glycoprotein Ib alpha chain (Glycoprotein Ibalpha) (GP-Ib alpha) (GPIbA) (GPIb-alpha) (CD42B-alpha) (CD42B) [Contains: Glycocalicin] (chains B)
HPICEVSKVASHLEVNCDKRDLTALPPDLPKDTTILHLSENLLYTFSLATLMPYTRLTQL
NLDRCELTKLQVDGTLPVLGTLDLSHNQLQSLPLLGQTLPALTVLDVSFNRLTSLPLGAL
RGLGELQELYLKGNELKTLPPGLLTPTPKLEKLSLANNDLTELPAGLLNGLENLDTLLLQ
ENSLYTIPKGFFGSHLLPFAFLHGNPWLCNCEILYFRRWLQDNAENVYVWKQGVDVKAMT
SNVASVQCDNSDKFPVYKYPGKGCPTLGDEGDTDLYDYYPEEDTEGDK

Primary citation

Crystal structure of the wild-type von Willebrand factor A1-glycoprotein Ibalpha complex reveals conformation differences with a complex bearing von Willebrand disease mutations. Dumas, J.J., Kumar, R., McDonagh, T. et al. J Biol Chem (2004) 279:23327-23334. DOI 10.1074/jbc.M401659200 · PubMed

Other PDB entries of the same protein (UniProt P04275 (AlphaFold model), which also has an AlphaFold model), best resolution first:

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