1AB1: Si form crambin

Si form crambin. Determined by X-ray diffraction at 0.89 Å resolution. Released 12 Aug 1997.

Method: X-ray diffraction
Resolution: 0.89 Å
Organism: Crambe hispanica subsp. abyssinica
Chains: 1
Atoms: 355
Mol. weight: 4.77 kDa
Ligands: EOH
Released: 12 Aug 1997

Explore 1AB1 in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

1AB1 contains 2 α-helices and 2 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: 2 helices, 2 β-strands

Element	Residues	Length	Sheet
β-strand	2-3	2	1
α-helix	7-17	11
α-helix	23-30	8
β-strand	33-34	2	1

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
Crambin (SER22/ILE25)	A	protein	46	Crambe hispanica subsp. abyssinica	P01542 (AlphaFold model)

Sequence of entity 1 (A), FASTA

>1AB1_1 CRAMBIN (SER22/ILE25) (chains A)
TTCCPSIVARSNFNVCRLPGTSEAICATYTGCIIIPGATCPGDYAN

Ligands and cofactors

ID	Name	Formula	Copies
EOH	Ethanol	C2 H6 O	1

Primary citation

Crystal structure of Ser-22/Ile-25 form crambin confirms solvent, side chain substate correlations. Yamano, A., Heo, N.H., Teeter, M.M. J Biol Chem (1997) 272:9597-9600. DOI 10.1074/jbc.272.15.9597 · PubMed

Other PDB entries of the same protein (UniProt P01542 (AlphaFold model), which also has an AlphaFold model), best resolution first:

3NIR 0.48 Å, Crystal structure of small protein crambin at 0.48 A resolution
1EJG 0.54 Å, Crambin at ultra-high resolution: valence electron density.
9EWK 0.7 Å, Solvent organization in ultrahigh-resolution protein crystal structure at room temperature
1CBN 0.83 Å, Atomic resolution (0.83 Å) crystal structure of the hydrophobic protein crambin at 130 K
3U7T 0.85 Å, Room temperature ultra-high resolution time-of-flight neutron and X-ray diffraction…
9PIS 0.85 Å, Ab initio structure of crambin by MicroED at 0.85A
1JXT 0.89 Å, Crambin mixed sequence form at 160 K. Protein/water substates
1JXW 0.89 Å, Crambin mixed sequence form at 180 K. Protein/water substates
1JXX 0.89 Å, Crambin mixed sequence form at 200 K. Protein/water substates
1JXY 0.89 Å, Crambin mixed sequence form at 220 K. Protein/water substates
1JXU 0.99 Å, Crambin mixed sequence form at 240 K. Protein/water substates
1CNR 1.05 Å, Correlated disorder of the pure PRO22(SLASH)LEU25 form of crambin at 150K refined to…

Browse structure collections

About this viewer

MolViewer shows 1AB1 directly in your browser with nothing to install. Switch between cartoon, ball-and-stick, spacefill and surface views, color by chain, secondary structure or B-factor, measure distances, angles and dihedrals, and share or embed the view.