Entry
Name
pitrilysin;
Escherichia coli protease III;
protease Pi;
proteinase Pi;
PTR;
Escherichia coli metalloproteinase Pi
Class
Hydrolases;
Acting on peptide bonds (peptidases);
Metalloendopeptidases
BRITE hierarchy
Reaction(IUBMB)
Preferential cleavage of -Tyr16! Leu- and -Phe25! Tyr-bonds of oxidized insulin B chain. Also acts on other substrates of less than 7 kDa such as insulin and glucagon
Comment
From the periplasmic space of Escherichia coli. Inhibited by EDTA and 1,10-phenanthroline; not thiol-dependent. Type example of peptidase family M16
History
EC 3.4.24.55 created 1992 as EC 3.4.99.44, transferred 1993 to EC 3.4.24.55 (EC 3.4.99.45 created 1992, incorporated 1993)
Orthology
Genes
ECOO : ECRM13514_3684(ptr)
ECOH : ECRM13516_3548(ptr)
ECW : EcE24377A_3141(ptrA)
EDJ : ECDH1ME8569_2728(ptrA)
ECOI : ECOPMV1_03108(ptrA)
REE : electrica_00886(ptrA)
RTG : NCTC13098_01296(ptrA)
CLAP : NCTC11466_00689(ptrA)
KIE : NCTC12125_04851(ptrA_1)
AHN : NCTC12129_04010(ptrA)
METY : MRY16398_09980(ptrA)
PTF : PROFFT_A_02210(ptrA)
PSHI : SAMEA2665130_2427(ptrA_2)
YPG : YpAngola_A3232(ptrA)
YPI : YpsIP31758_0990(ptrA)
SMW : SMWW4_v1c39360(ptrA)
SFJ : SAMEA4384070_3936(ptrA_2)
SOF : NCTC11214_02814(ptrA_1)
PAQU : DMB82_0015880(ptrA)
MINT : C7M51_02576(ptrA_1)
MTHI : C7M52_00280(ptrA_1)
PRG : RB151_035780(ptrA_2)
PHEI : NCTC12003_03087(ptrA)
PRJ : NCTC6933_03187(ptrA)
LRI : NCTC12151_00676(ptrA)
ALIG : NCTC10568_02299(ptrA_1)
PPHE : PP2015_3366 PP2015_686
PPIS : B1L02_18380 B1L02_19840
PSEN : PNC201_17685(ptrA3) PNC201_18680(ptrA4)
GIL : NHM04_03585 NHM04_11200
» show all
Taxonomy
Reference
Authors
Finch PW, Wilson RE, Brown K, Hickson ID, Emmerson PT
Title
Complete nucleotide sequence of the Escherichia coli ptr gene encoding protease III.
Journal
Sequence
Reference
Authors
Affholter JA, Fried VA, Roth RA.
Title
Human insulin-degrading enzyme shares structural and functional homologies with E. coli protease III.
Journal
Reference
Authors
Becker AB, Roth RA.
Title
An unusual active site identified in a family of zinc metalloendopeptidases.
Journal
Reference
Authors
Ding L, Becker AB, Suzuki A, Roth RA.
Title
Comparison of the enzymatic and biochemical properties of human insulin-degrading enzyme and Escherichia coli protease III.
Journal
J Biol Chem 267:2414-20 (1992)
Reference
Authors
Anastasi A, Knight CG, Barrett AJ.
Title
Characterization of the bacterial metalloendopeptidase pitrilysin by use of a continuous fluorescence assay.
Journal
Other DBs
ExPASy - ENZYME nomenclature database: 3.4.24.55