ISDA: 1DEG

Deposition Date 1993-06-07

Release Date 1994-05-31

Last Version Date 2024-02-07

Entry Detail

PDB ID:

1DEG

Keywords:

CALCIUM-BINDING PROTEIN

Title:

THE LINKER OF DES-GLU84 CALMODULIN IS BENT AS SEEN IN THE CRYSTAL STRUCTURE

Biological Source:

Source Organism:

Bos taurus (Taxon ID: 9913)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.90 Å

R-Value Work:

0.23

R-Value Observed:

0.23

Space Group:

P 21 21 21

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:CALMODULIN
Chain IDs:A
Chain Length:142
Number of Molecules:1
Biological Source:Bos taurus

UniProt ID:P62157 Pfam ID:PF13499

Ligand Molecules

Primary Citation

The linker of des-Glu84-calmodulin is bent.

Raghunathan, S, Chandross, R.J, Cheng, B.P, Persechini, A, Sobottka, S.E, Kretsinger, R.H, Kataoka, M, Head, J.F, Persechini, A, Kretsinger, R.H, Engelman, D.M, Persechini, A, Kretsinger, R.H, Davis, T.N, Persechini, A, Blumenthal, D.K, Jarrett, H.W, Klee, C.B, Hardy, D.O, Kretsinger, R.H, Persechini, A, Kretsinger, R.H, Persechini, A, Kretsinger, R.H.Show

Proc.Natl.Acad.Sci.Usa 90 6869 6873 (1993)

PMID: 8341712 DOI: 10.1073/pnas.90.14.6869

Abstact

The crystal structure of a mutant calmodulin (CaM) lacking Glu-84 has been refined to R = 0.23 using data measured to 2.9-A resolution. In native CaM the central helix is fully extended, and the molecule is dumbbell shaped. In contrast, the deletion of Glu-84 causes a bend of 95 degrees in the linker region of the central helix at Ile-85. However, EF-hand domains 1 and 2 (lobe 1,2) do not touch lobe 3,4. The length, by alpha-carbon separation, of des-Glu84-CaM is 56 A; that of native CaM is 64 A. The shape of des-Glu84-CaM is similar to that of native CaM, as it is bound to the target peptide of myosin light-chain kinase. This result supports the proposal that the linker region of the central helix of CaM functions as a flexible tether.

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Primary Citation of related structures