1IMP: IM9

Colicin E9 immunity protein IM9, NMR, 21 structures. Determined by solution NMR. Released 17 Sept 1997.

Method: Solution NMR
Organism: Escherichia coli
Chains: 1
Atoms: 672
Mol. weight: 9.59 kDa
Released: 17 Sept 1997

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

Secondary structure: helices and β-sheets

1IMP contains 7 α-helices and 0 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: 7 helices, 0 β-strands

Element	Residues	Length
α-helix	7-9	3
α-helix	12-20	9
α-helix	21-25	5
α-helix	30-44	15
α-helix	51-54	4
α-helix	65-74	10
α-helix	75-79	5

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
IM9	A	protein	86	Escherichia coli	P13479 (AlphaFold model)

Sequence of entity 1 (A), FASTA

>1IMP_1 IM9 (chains A)
MELKHSISDYTEAEFLQLVTTICNADTSSEEELVKLVTHFEEMTEHPSGSDLIYYPKEGD
DDSPSGIVNTVKQWRAANGKSGFKQG

Primary citation

Three-dimensional solution structure and 13C nuclear magnetic resonance assignments of the colicin E9 immunity protein Im9. Osborne, M.J., Breeze, A.L., Lian, L.Y. et al. Biochemistry (1996) 35:9505-9512. DOI 10.1021/bi960401k · PubMed

Other PDB entries of the same protein (UniProt P13479 (AlphaFold model), which also has an AlphaFold model), best resolution first:

1FR2 1.6 Å, Crystal structure of the E9 DNase domain with a mutant immunity protein IM9(E41A)
2GYK 1.6 Å, Crystal structure of the complex of the Colicin E9 DNase domain with a mutant immunity…
2GZJ 1.6 Å, Crystal Structure of the E9 DNase Domain with a Mutant Immunity Protein IM9 (D51A)
2VLN 1.6 Å, N75A mutant of E9 DNase domain in complex with Im9
2VLQ 1.6 Å, F86A mutant of E9 DNase domain in complex with Im9
1EMV 1.7 Å, Crystal structure of colicin E9 DNase domain with its cognate immunity protein IM9 (1.7 Å)
2GZG 1.7 Å, Crystal Structure of the E9 DNase Domain with a Mutant Immunity Protein IM9 (Y55F)
2GZI 1.7 Å, Crystal Structure of the E9 DNase Domain with a Mutant Immunity Protein IM9 (V34A)
2GZF 1.75 Å, Crystal structure of the E9 DNase domain with a mutant immunity protein IM9 (Y54F)
2GZE 1.8 Å, Crystal structure of the E9 DNase domain with a mutant immunity protein IM9 (Y55A)
2VLO 1.8 Å, K97A mutant of E9 DNase domain in complex with Im9
2VLP 2.0 Å, R54A mutant of E9 DNase domain in complex with Im9

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