ISDA

Entry Detail

PDB ID:

1QRZ

Keywords:

HYDROLASE

Title:

CATALYTIC DOMAIN OF PLASMINOGEN

Biological Source:

Source Organism:

Homo sapiens

PDB Version:

Deposition Date:

1999-06-16

Release Date:

1999-10-14

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.00 Å

R-Value Free:

0.29

R-Value Work:

0.23

R-Value Observed:

0.23

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:PLASMINOGEN
Mutations:M585Q, V673M, M788L
Chain IDs:A, B, C, D
Chain Length:246
Number of Molecules:4
Biological Source:Homo sapiens

UniProt ID:P00747 Pfam ID:PF00089 EC:3.4.21.7

Primary Citation

Crystal structure of the proenzyme domain of plasminogen.

Peisach, E, Wang, J, de los Santos, T, Reich, E, Ringe, D, Spraggon, G.S, Phillips, C, Nowak, U.K, Ponting, C.P, Saunders, D, Dobson, C.M, Stuart, D.I, Jones, E.Y, Parry, M.A, Fernandez-Catalan, C, Bergner, A, Huber, R, Hopfner, K.P, Schlott, B, Guhrs, K.H, Bode, W, Wang, X, Lin, X, Loy, J.A, Tang, J, Zhang, X.C.Show

Biochemistry 38 11180 11188 (1999)

PMID: 10460175 DOI: 10.1021/bi991130r

Abstact

We have solved the X-ray crystal structure of the proenzyme form of the catalytic domain of plasminogen, with the nonessential mutations M585Q, V673M, and M788L, to 2.0 A resolution. The structure presents an inactive protease characterized by Asp740 (chymotrypsinogen 194) hydrogen bonded to His586 (chymotrypsinogen 40), preventing proper formation of the oxyanion hole and S1 specificity pocket. In addition, the catalytic triad residues are misplaced relative to the active conformation adopted by serine proteases in the chymotrypsin family. Finally, a unique form of zymogen inactivation is observed, characterized by a "foot-in-mouth" mechanism in which Trp761 (chymotrypsinogen 215) is folded into the S1 specificity pocket preventing substrate binding.

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Primary Citation of related structures