ISDA

Deposition Date 1994-08-26

Release Date 1994-11-01

Last Version Date 2024-11-20

Entry Detail

PDB ID:

1BIT

Keywords:

SERINE PROTEINASE

Title:

THE CRYSTAL STRUCTURE OF ANIONIC SALMON TRYPSIN IN A SECOND CRYSTAL FORM

Biological Source:

Source Organism:

Salmo salar (Taxon ID: 8030)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.83 Å

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

P 21 21 2

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:TRYPSIN
Chain IDs:A
Chain Length:237
Number of Molecules:1
Biological Source:Salmo salar

UniProt ID:P35031 Pfam ID:PF00089

Ligand Molecules

BEN

SO4

Primary Citation

Structure of anionic salmon trypsin in a second crystal form.

Berglund, G.I, Smalas, A.O, Hordvik, A, Willassen, N.P, Smalas, A.O, Heimstad, E.S, Hordvik, A, Willassen, N.P, Smalas, A.O, Hordvik, A, Smalas, A.O, Hordvik, A, Hansen, L.K, Hough, E, Jynge, K, Bartunik, H.D, Summers, L.J, Bartsch, H.H, Marquart, M, Walter, J, Deisenhofer, J, Bode, W, Huber, R, Chambers, J.H, Stroud, R.M.Show

Acta Crystallogr.,Sect.D 51 725 730 (1995)

PMID: 15299802 DOI: 10.1107/S0907444995000333

Abstact

Anionic salmon trypsin in a second crystal form (ST-IIB) has been refined at 1.83 A, resolution. The crystals are orthorhombic and belong to space group P2(1)2(1)2 with lattice parameters a = 77.09, b = 82.33 and c = 31.16 A. The present structure has been compared to salmon trypsin as it appears in a previously reported crystal form (ST-IIA) with cell dimensions a = 61.95, b = 84.33 and c = 39.11 A [Smalås & Hordvik (1993). Acta Cryst. D49, 318-330]. The presence of a sulfate group involved in several hydrogen bonds to active-site residues, and the location of an additional benzamidine site in the crystal lattice, are the most striking differences between the present and the previous structure. Superposition of main-chain atoms in the two structures give an overall r.m.s. difference of 0.26 A, with the main differences located to areas with different molecular packing. The overall coordinate error is estimated to be between 0.20 and 0.25 A, by the method of Luzzati.

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Primary Citation of related structures