1KHX: Phosphorylated Smad2

Crystal structure of a phosphorylated Smad2. Determined by X-ray diffraction at 1.8 Å resolution. Released 6 Feb 2002.

Method: X-ray diffraction
Resolution: 1.8 Å
Organism: Homo sapiens
Chains: 1
Atoms: 1,757
Mol. weight: 25.54 kDa
Released: 6 Feb 2002

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

Secondary structure: helices and β-sheets

1KHX contains 10 α-helices and 12 β-strands across 1 chain. 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: 10 helices, 12 β-strands

Element	Residues	Length	Sheet
β-strand	275-281	7	1
β-strand	284-285	2	1
α-helix	288-289	2
β-strand	290-292	3	1
β-strand	296-300	5	2
β-strand	310-312	3	2
α-helix	313-315	3
α-helix	323-329	7
β-strand	336-341	6	2
β-strand	344-349	6	2
β-strand	355-358	4	1
α-helix	360-365	6
β-strand	374-376	3	1
β-strand	381-386	6	2
α-helix	387-397	11
α-helix	398-400	3
α-helix	402-406	5
α-helix	407-412	6
β-strand	413-418	6	1
α-helix	431-433	3
β-strand	437-442	6	1
α-helix	443-453	11

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
Smad2	A	protein	227	Homo sapiens	Q15796 (AlphaFold model)

Sequence of entity 1 (A), FASTA

>1KHX_1 Smad2 (chains A)
MDTGSPAELSPTTLSPVNHSLDLQPVTYSEPAFWCSIAYYELNQRVGETFHASQPSLTVD
GFTDPSNSERFCLGLLSNVNRNATVEMTRRHIGRGVRLYYIGGEVFAECLSDSAIFVQSP
NCNQRYGWHPATVCKIPPGCNLKIFNNQEFAALLAQSVNQGFEAVYQLTRMCTIRMSFVK
GWGAEYRRQTVTSTPCWIELHLNGPLQWLDKVLTQMGSPSVRCSSMS

Primary citation

Crystal structure of a phosphorylated Smad2. Recognition of phosphoserine by the MH2 domain and insights on Smad function in TGF-beta signaling. Wu, J.W., Hu, M., Chai, J. et al. Mol Cell (2001) 8:1277-1289. DOI 10.1016/S1097-2765(01)00421-X · PubMed

Other PDB entries of the same protein (UniProt Q15796 (AlphaFold model), which also has an AlphaFold model), best resolution first:

6YIA 1.3 Å, 14-3-3 sigma in complex with SMAD2 pS465 peptide
6M64 1.45 Å, Crystal structure of SMAD2 in complex with CBP
5XOD 1.85 Å, Crystal structure of human Smad2-Ski complex
6ZVQ 2.03 Å, Complex between SMAD2 MH2 domain and peptide from Ski corepressor
1DEV 2.2 Å, Crystal structure of SMAD2 MH2 domain bound to the smad-binding domain of sara
1U7V 2.7 Å, Crystal Structure of the phosphorylated Smad2/Smad4 heterotrimeric complex
5ZOJ 2.79 Å, Crystal structure of human SMAD2-MAN1 complex
7CO1 3.3 Å, Crystal structure of SMAD2 in complex with wild-type CBP
2LB3 Structure of the WW domain of PIN1 in complex with a human phosphorylated Smad3 derived…

Browse structure collections

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