Escherichia coli K-12 substr. MG1655 Polypeptide: predicted hydrolase

Gene: php Accession Numbers: G7731 (EcoCyc), b3379, ECK3366

Synonyms: yhfV

Regulation Summary Diagram: ?

Regulation summary diagram for php

The Php protein is similar to phosphotriesterase from Pseudomonas diminuta, but unlike that enzyme, it does not catalyze the hydrolysis of nonspecific phosphotriesters. Its physiological function is unknown [Buchbinder98].

Php is a monomer in solution. A crystal structure has been solved at 1.7 Å resolution. The structure, an α/β barrel, is similar to that of phosphotriesterase and contains a binuclear zinc center at the presumed active site [Buchbinder98].

Php: "phosphotriesterase homology protein" [Buchbinder98]

Locations: cytosol

Map Position: [3,505,734 <- 3,506,612] (75.56 centisomes, 272°)
Length: 879 bp / 292 aa

Molecular Weight of Polypeptide: 32.915 kD (from nucleotide sequence)

Unification Links: ASAP:ABE-0011044 , DIP:DIP-10504N , EchoBASE:EB2753 , EcoGene:EG12917 , EcoliWiki:b3379 , ModBase:P45548 , OU-Microarray:b3379 , PortEco:php , PR:PRO_000023548 , Pride:P45548 , Protein Model Portal:P45548 , RefSeq:NP_417838 , RegulonDB:G7731 , SMR:P45548 , String:511145.b3379 , UniProt:P45548

Relationship Links: InterPro:IN-FAMILY:IPR001559 , InterPro:IN-FAMILY:IPR017947 , InterPro:IN-FAMILY:IPR027280 , Panther:IN-FAMILY:PTHR10819 , PDB:Structure:1BF6 , PDB:Structure:4LEF , Pfam:IN-FAMILY:PF02126 , Prosite:IN-FAMILY:PS01322 , Prosite:IN-FAMILY:PS51347

GO Terms:

Biological Process: GO:0009056 - catabolic process Inferred by computational analysis [GOA01]
Molecular Function: GO:0008270 - zinc ion binding Inferred from experiment Inferred by computational analysis [GOA01, Buchbinder98]
GO:0016787 - hydrolase activity Inferred by computational analysis [UniProtGOA11]
GO:0016788 - hydrolase activity, acting on ester bonds Inferred by computational analysis [GOA01]
GO:0046872 - metal ion binding Inferred by computational analysis [UniProtGOA11]
Cellular Component: GO:0005829 - cytosol Inferred by computational analysis [DiazMejia09]


Essentiality data for php knockouts: ?

Growth Medium Growth? T (°C) O2 pH Osm/L Growth Observations
LB enriched Yes 37 Aerobic 6.95   Yes [Gerdes03, Comment 1]
LB Lennox Yes 37 Aerobic 7   Yes [Baba06, Comment 2]
M9 medium with 1% glycerol Yes 37 Aerobic 7.2 0.35 Yes [Joyce06, Comment 3]
MOPS medium with 0.4% glucose Yes 37 Aerobic 7.2 0.22 Yes [Baba06, Comment 2]

Last-Curated ? 18-Aug-2010 by Keseler I , SRI International

Sequence Features

Protein sequence of predicted hydrolase with features indicated

Feature Class Location Citations Comment
Metal-Binding-Site 12
UniProt: Zinc 1; via tele nitrogen.
Metal-Binding-Site 14
UniProt: Zinc 1; via tele nitrogen.
Metal-Binding-Site 125
UniProt: Zinc 1.
Metal-Binding-Site 158
UniProt: Zinc 2; via pros nitrogen.
Metal-Binding-Site 186
UniProt: Zinc 2; via tele nitrogen.
Metal-Binding-Site 243
UniProt: Zinc 1.

Gene Local Context (not to scale): ?

Gene local context diagram

Transcription Unit:

Transcription-unit diagram


Markus Krummenacker on Tue Oct 14, 1997:
Gene object created from Blattner lab Genbank (v. M52) entry.


Baba06: Baba T, Ara T, Hasegawa M, Takai Y, Okumura Y, Baba M, Datsenko KA, Tomita M, Wanner BL, Mori H (2006). "Construction of Escherichia coli K-12 in-frame, single-gene knockout mutants: the Keio collection." Mol Syst Biol 2;2006.0008. PMID: 16738554

Buchbinder98: Buchbinder JL, Stephenson RC, Dresser MJ, Pitera JW, Scanlan TS, Fletterick RJ (1998). "Biochemical characterization and crystallographic structure of an Escherichia coli protein from the phosphotriesterase gene family." Biochemistry 37(15);5096-106. PMID: 9548740

DiazMejia09: Diaz-Mejia JJ, Babu M, Emili A (2009). "Computational and experimental approaches to chart the Escherichia coli cell-envelope-associated proteome and interactome." FEMS Microbiol Rev 33(1);66-97. PMID: 19054114

Gerdes03: Gerdes SY, Scholle MD, Campbell JW, Balazsi G, Ravasz E, Daugherty MD, Somera AL, Kyrpides NC, Anderson I, Gelfand MS, Bhattacharya A, Kapatral V, D'Souza M, Baev MV, Grechkin Y, Mseeh F, Fonstein MY, Overbeek R, Barabasi AL, Oltvai ZN, Osterman AL (2003). "Experimental determination and system level analysis of essential genes in Escherichia coli MG1655." J Bacteriol 185(19);5673-84. PMID: 13129938

GOA01: GOA, DDB, FB, MGI, ZFIN (2001). "Gene Ontology annotation through association of InterPro records with GO terms."

Joyce06: Joyce AR, Reed JL, White A, Edwards R, Osterman A, Baba T, Mori H, Lesely SA, Palsson BO, Agarwalla S (2006). "Experimental and computational assessment of conditionally essential genes in Escherichia coli." J Bacteriol 188(23);8259-71. PMID: 17012394

UniProt15: UniProt Consortium (2015). "UniProt version 2015-01 released on 2015-01-16 00:00:00." Database.

UniProtGOA11: UniProt-GOA (2011). "Gene Ontology annotation based on manual assignment of UniProtKB keywords in UniProtKB/Swiss-Prot entries."

Report Errors or Provide Feedback
Please cite the following article in publications resulting from the use of EcoCyc: Nucleic Acids Research 41:D605-12 2013
Page generated by SRI International Pathway Tools version 19.0 on Mon Oct 5, 2015, biocyc12.