1LMN

THE REFINED CRYSTAL STRUCTURE OF LYSOZYME FROM THE RAINBOW TROUT (ONCORHYNCHUS MYKISS)

PDB DOI: 10.2210/pdb1LMN/pdb

Classification: HYDROLASE (O-GLYCOSYL)
Organism(s): Oncorhynchus mykiss
Mutation(s): No

Deposited: 1994-10-19 Released: 1995-02-07
Deposition Author(s): Karlsen, S., Hough, E.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.80 Å
R-Value Observed: 0.174

wwPDB Validation 3D Report Full Report

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

Literature

Refined crystal structure of lysozyme from the rainbow trout (Oncorhynchus mykiss).

Karlsen, S., Eliassen, B.E., Hansen, L.K., Larsen, R.L., Riise, B.W., Smalas, A.O., Hough, E., Grinde, B.

(1995) Acta Crystallogr D Biol Crystallogr 51: 354-367

PubMed: 15299303 Search on PubMed
DOI: 10.1107/S0907444994010929
Primary Citation of Related Structures:
1LMN

PubMed Abstract:

Lysozymes (E.C. 3.2.1.17) are well characterized ubiquitous enzymes that have an antibacterial effect. The lysozymes from rainbow trout (RBTL) (Oncorhynchus mykiss) could be particularly interesting in aquaculture since they show higher activity than egg-white lysozyme and lysozymes from other fish species against a variety of pathogenic bacteria. Two lysozymes, I and II, differing only in a single amino acid, were purified from the kidney of rainbow trout and shown to belong to the c-type class of lysozymes. The type II form was shown to be much more potent against a variety of bacteria than the type I enzyme. We have grown crystals from a mixture containing about 80% type I and 20% type II lysozyme from rainbow trout, and solved the X-ray crystal structure. The crystals are trigonal with a = 76.68, c = 54.46 A and space group P3(1)21. The phase problem was solved by the molecular-replacement method, and the structure was refined to an R-factor of 17.4% using data to 1.8 A resolution. The crystal structure shows that the three-dimensional structure of rainbow trout lysozyme is very similar to the previously solved structures of other c-type lysozymes. The single polypeptide of 129 amino acids is folded into two domains separated by a deep cleft which contains the active site. Secondary-structure elements, four alpha-helices and a three-stranded beta-sheet, are located in the same sequential positions as in the hen, turkey and human enzymes. The beta-sheet is found to be common for structures of both c- and g-type lysozymes. We suggest that differences in antibiotic activity of the two forms of RBTL are probably due to small differences in the hydophobicity of a small surface region.

Related Citations:

Purification and Characterization of Two Lysozymes from Rainbow Trout (Salmo Gairdneri)
Grinde, B., Jolles, J., Jolles, P.
(1988) Eur J Biochem 173: 269

Organizational Affiliation:

Department of Chemistry, Institute of Mathematical and Physical Science, University of Tromsø, Norway.

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
RAINBOW TROUT LYSOZYME	A	129	Oncorhynchus mykiss	Mutation(s): 0 EC: 3.2.1.17
UniProt
Find proteins for P11941 (Oncorhynchus mykiss) Explore P11941 Go to UniProtKB: P11941
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P11941
Protein Feature View Expand
Reference Sequence