ISDA

Deposition Date 2003-10-02

Release Date 2003-11-18

Last Version Date 2024-11-13

Entry Detail

PDB ID:

1R3M

Keywords:

HYDROLASE

Title:

Crystal structure of the dimeric unswapped form of bovine seminal ribonuclease

Biological Source:

Source Organism:

Bos taurus (Taxon ID: 9913)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.20 Å

R-Value Free:

0.29

R-Value Work:

0.21

R-Value Observed:

0.22

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Ribonuclease, seminal
Gene (Uniprot):SRN
Chain IDs:A, B
Chain Length:124
Number of Molecules:2
Biological Source:Bos taurus

UniProt ID:P00669 Pfam ID:PF00074 EC:4.6.1.18

Ligand Molecules

PO4

Primary Citation

Crystal structure of the dimeric unswapped form of bovine seminal ribonuclease

Berisio, R, Sica, F, De Lorenzo, C, Di Fiore, A, Piccoli, R, Zagari, A, Mazzarella, L, Mazzarella, L, CAPASSO, S, DE MASI, D, DI LORENZO, G, MATTIA, C.A, ZAGARI, A, SICA, F, DI FIORE, A, ZAGARI, A, MAZZARELLA, L.Show

Febs Lett. 554 105 110 (2003)

PMID: 14596923 DOI: 10.1016/S0014-5793(03)01114-1

Abstact

Bovine seminal ribonuclease is a unique case of protein dimorphism, since it exists in two dimeric forms, with different biological and kinetic behavior, which interconvert into one another through three-dimensional swapping. Here we report the crystal structure, at 2.2 A resolution, of the unswapped form of bovine seminal ribonuclease. Besides completing the structural definition of bovine seminal ribonuclease conformational dimorphism, this study provides the structural basis to explain the dependence of the enzyme cooperative effects on its swapping state.

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Primary Citation of related structures