2WC8

S100A12 complex with zinc in the absence of calcium

DOI: 10.2210/pdb2WC8/pdb

Classification: METAL BINDING PROTEIN
Organism(s): Homo sapiens
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2009-03-10 Released: 2009-06-23
Deposition Author(s): Moroz, O.V., Blagova, E.V., Wilkinson, A.J., Wilson, K.S., Bronstein, I.B.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.88 Å
R-Value Free: 0.236
R-Value Work: 0.171
R-Value Observed: 0.174

wwPDB Validation 3D Report Full Report

This is version 1.2 of the entry. See complete history.

Literature

The Crystal Structures of Human S100A12 in Apo Form and in Complex with Zinc: New Insights Into S100A12 Oligomerisation.

Moroz, O.V., Blagova, E.V., Wilkinson, A.J., Wilson, K.S., Bronstein, I.B.

(2009) J Mol Biol 391: 536

PubMed: 19501594 Search on PubMed
DOI: 10.1016/j.jmb.2009.06.004
Primary Citation of Related Structures:
2WC8, 2WCF, 2WCB, 2WCE

PubMed Abstract:

The functions of the members of the S100 family of EF-hand proteins are modulated by calcium and, in a number of cases, by zinc or copper. One such protein is S100A12, which is implicated in inflammation and host-parasite responses. Previously, we reported the structures of human S100A12 in both low (dimeric) and high (hexameric) calcium forms and, in addition, that of a complex with copper and calcium. Here we report the crystal structures of the metal-free apo form of human S100A12 at 1.77 A resolution and of the zinc complex in two crystal forms (P2(1)2(1)2(1) and F222) to 1.88 A and 1.73 A resolution, respectively. These are the first structures of a zinc-only complex of an S100 protein to be determined. The zinc complex structure shows significant differences from those of both calcium-loaded and apo-S100A12 structures, and comparisons suggest an explanation for the zinc-induced 1500-fold increase in calcium affinity. In addition, the new structures provide insight into the role of zinc-calcium interplay in the transition of S100A12 from a dimer through a tetramer to a hexamer. The role of both zinc and calcium in target binding by S100A12 during host-parasite responses is confirmed by experiments with paramyosin from the tropical parasites Onchocerca volvulus and Brugia malayi.

Related Citations:

The Three-Dimensional Structure of Human S100A12.
Moroz, O.V., Antson, A.A., Murshudov, G.N., Maitland, N.J., Dodson, G.G., Wilson, K.S., Skibshoj, I., Lukanidin, E.M., Bronstein, I.B.
(2001) Acta Crystallogr D Biol Crystallogr 57: 20

Structure of the Human S100A12-Copper Complex: Implications for Host-Parasite Defence.
Moroz, O.V., Antson, A.A., Grist, S.J., Maitland, N.J., Dodson, G.G., Wilson, K.S., Lukanidin, E., Bronstein, I.B.
(2003) Acta Crystallogr D Biol Crystallogr 59: 859

The Structure of S100A12 in a Hexameric Form and its Proposed Role in Receptor Signalling.
Moroz, O.V., Antson, A.A., Dodson, E.J., Burrell, H.J., Grist, S.J., Lloyd, R.M., Maitland, N.J., Dodson, G.G., Wilson, K.S., Lukanidin, E., Bronstein, I.B.
(2002) Acta Crystallogr D Biol Crystallogr 58: 407

Organizational Affiliation:

Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5YW, UK. olga@ysbl.york.ac.uk

Macromolecules

Find similar proteins by:

(by identity cutoff) | Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN S100-A12	A, B, C, D	95	Homo sapiens	Mutation(s): 0 Gene Names: S100A12
Find proteins for P80511 (Homo sapiens) Explore P80511 Go to UniProtKB: P80511
NIH Common Fund Data Resources
PHAROS: P80511 GTEx: ENSG00000163221
Protein Feature View Expand
Reference Sequence

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
CIT Query on CIT Download Ideal Coordinates CCD File SDF format, chain K [C] MOL2 format, chain K [C]	C	CITRIC ACID C₆ H₈ O₇ KRKNYBCHXYNGOX-UHFFFAOYSA-N		Ligand Interaction
ZN Query on ZN Download Ideal Coordinates CCD File SDF format, chain F [A] SDF format, chain H [B] SDF format, chain J [C] SDF format, chain M [D] MOL2 format, chain F [A] MOL2 format, chain H [B] MOL2 format, chain J [C] MOL2 format, chain M [D]	A, B, C, D	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N		Ligand Interaction
NA Query on NA Download Ideal Coordinates CCD File SDF format, chain E [A] SDF format, chain G [B] SDF format, chain I [C] SDF format, chain L [D] MOL2 format, chain E [A] MOL2 format, chain G [B] MOL2 format, chain I [C] MOL2 format, chain L [D]	A, B, C, D	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N		Ligand Interaction