ISDA

Entry Detail

PDB ID:

2YPM

Keywords:

Title:

Crystal Structure of Ancestral Thioredoxin Relative to Last Animal and Fungi Common Ancestor (LAFCA) from the Precambrian Period

Biological Source:

Source Organism:

SYNTHETIC CONSTRUCT

Host Organism:

ESCHERICHIA COLI

PDB Version:

Deposition Date:

2012-10-30

Release Date:

2013-08-21

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.20 Å

R-Value Free:

0.23

R-Value Work:

0.16

R-Value Observed:

0.17

Space Group:

P 21 21 21

Download Validation Report

Macromolecular Entities

Polymer Type:polypeptide(L)
Description:LAFCA THIOREDOXIN
Chain IDs:A
Chain Length:106
Number of Molecules:1
Biological Source:SYNTHETIC CONSTRUCT

Primary Citation

Conservation of Protein Structure Over Four Billion Years

Ingles-Prieto, A, Ibarra-Molero, B, Delgado-Delgado, A, Perez-Jimenez, R, Fernandez, J.M, Gaucher, E.A, Sanchez-Ruiz, J.M, Gavira, J.A.Show

Structure 21 1690 ? (2013)

PMID: 23932589 DOI: 10.1016/J.STR.2013.06.020

Abstact

Little is known about the evolution of protein structures and the degree of protein structure conservation over planetary time scales. Here, we report the X-ray crystal structures of seven laboratory resurrections of Precambrian thioredoxins dating up to approximately four billion years ago. Despite considerable sequence differences compared with extant enzymes, the ancestral proteins display the canonical thioredoxin fold, whereas only small structural changes have occurred over four billion years. This remarkable degree of structure conservation since a time near the last common ancestor of life supports a punctuated-equilibrium model of structure evolution in which the generation of new folds occurs over comparatively short periods and is followed by long periods of structural stasis.

Legend

Protein

Chemical

Disease

Primary Citation of related structures