Escherichia coli K-12 substr. MG1655 Protein: essential respiratory protein A

Gene: erpA Accession Numbers: EG12332 (EcoCyc), b0156, ECK0155

Synonyms: yadR

Regulation Summary Diagram: ?

Regulation summary diagram for erpA

Subunit composition of essential respiratory protein A = [ErpA]2
         essential respiratory protein A = ErpA

ErpA is an A-type iron-sulfur protein; it can bind both [2Fe-2S] and [4Fe-4S] clusters. In vitro, ErpA can transfer a [4Fe-4S] cluster to apo-IspG [Loiseau07].

Functional redundancy between the three A-type carriers (ATCs) in E. coli, ErpA (an ATC-I) and IscA and SufA (both belonging to the ATC-II family), has been investigated [Vinella09].

erpA is essential for aerobic growth and under conditions of anaerobic respiration; the conserved cysteine residues are important for in vivo function. The growth defect of an erpA null mutant can be partially rescued by expression of the eukaryotic MVA-dependent pathway for IPP synthesis (mevalonate pathway I), whose enzymes do not contain Fe-S clusters. An erpA mutant contains 5-6-fold less quinone than wild type [Loiseau07]. An erpA null mutant contains no active Fdh-N, Fdh-O, and nitrate reductase [Pinske12] and no detectable hydrogenase 1 or hydrogenase 2 activity [Pinske12a] due to the absence of the [Fe-S] cluster-containing small subunits of these enzymes.

Transcription of erpA is under the direct control of IscR [Giel06].

ErpA: "essential respiratory protein A" [Loiseau07]

Review: [Py10]

Locations: cytosol

Map Position: [176,610 -> 176,954] (3.81 centisomes, 14°)
Length: 345 bp / 114 aa

Molecular Weight of Polypeptide: 12.1 kD (from nucleotide sequence)

Unification Links: ASAP:ABE-0000538 , DIP:DIP-48196N , EchoBASE:EB2236 , EcoGene:EG12332 , EcoliWiki:b0156 , ModBase:P0ACC3 , OU-Microarray:b0156 , PortEco:erpA , PR:PRO_000022532 , Pride:P0ACC3 , Protein Model Portal:P0ACC3 , RefSeq:NP_414698 , RegulonDB:EG12332 , SMR:P0ACC3 , String:511145.b0156 , Swiss-Model:P0ACC3 , UniProt:P0ACC3

Relationship Links: InterPro:IN-FAMILY:IPR000361 , InterPro:IN-FAMILY:IPR016092 , InterPro:IN-FAMILY:IPR017870 , InterPro:IN-FAMILY:IPR023063 , Pfam:IN-FAMILY:PF01521 , Prosite:IN-FAMILY:PS01152

In Paralogous Gene Group: 55 (3 members)

Gene-Reaction Schematic: ?

Gene-Reaction Schematic

Genetic Regulation Schematic: ?

Genetic regulation schematic for erpA

GO Terms:

Biological Process: GO:0009060 - aerobic respiration Inferred from experiment [Loiseau07]
GO:0009061 - anaerobic respiration Inferred from experiment [Loiseau07]
GO:0016226 - iron-sulfur cluster assembly Inferred from experiment Inferred by computational analysis [GOA06, GOA01, Loiseau07]
GO:0051604 - protein maturation Inferred from experiment [Loiseau07]
Molecular Function: GO:0051537 - 2 iron, 2 sulfur cluster binding Inferred from experiment [Loiseau07]
GO:0051539 - 4 iron, 4 sulfur cluster binding Inferred from experiment [Loiseau07]
GO:0005198 - structural molecule activity Inferred by computational analysis [GOA01]
GO:0005506 - iron ion binding Inferred by computational analysis [GOA06]
GO:0046872 - metal ion binding Inferred by computational analysis [UniProtGOA11]
GO:0051536 - iron-sulfur cluster binding Inferred by computational analysis [UniProtGOA11, GOA01]
Cellular Component: GO:0005829 - cytosol Inferred from experiment [Ishihama08, LopezCampistrou05]

MultiFun Terms: metabolism energy metabolism, carbon aerobic respiration
metabolism energy metabolism, carbon anaerobic respiration

Essentiality data for erpA 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 No 37 Aerobic 7   No [Baba06, Comment 2]

Created 24-Aug-2007 by Keseler I , SRI International
Last-Curated ? 22-Mar-2012 by Keseler I , SRI International

Sequence Features

Protein sequence of essential respiratory protein A with features indicated

Feature Class Location Citations Comment
Mutagenesis-Variant 42
[Loiseau07, UniProt11]
UniProt: Does not complement knockout.
Metal-Binding-Site 42
UniProt: Iron-sulfur; Non-Experimental Qualifier: probable;
Mutagenesis-Variant 106
[Loiseau07, UniProt11]
UniProt: Does not complement knockout.
Metal-Binding-Site 106
UniProt: Iron-sulfur; Non-Experimental Qualifier: probable;
Mutagenesis-Variant 108
[Loiseau07, UniProt11]
UniProt: Does not complement knockout.
Metal-Binding-Site 108
UniProt: Iron-sulfur; Non-Experimental Qualifier: probable;

Gene Local Context (not to scale): ?

Gene local context diagram

Transcription Unit:

Transcription-unit diagram


Peter D. Karp on Thu Jan 16, 2003:
Predicted gene function revised as a result of E. coli genome reannotation by Serres et al. [Serres01 ].
10/20/97 Gene b0156 from Blattner lab Genbank (v. M52) entry merged into EcoCyc gene EG12332; confirmed by SwissProt match.


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

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

Giel06: Giel JL, Rodionov D, Liu M, Blattner FR, Kiley PJ (2006). "IscR-dependent gene expression links iron-sulphur cluster assembly to the control of O-regulated genes in Escherichia coli." Mol Microbiol 60(4);1058-75. PMID: 16677314

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

GOA06: GOA, SIB (2006). "Electronic Gene Ontology annotations created by transferring manual GO annotations between orthologous microbial proteins."

Ishihama08: Ishihama Y, Schmidt T, Rappsilber J, Mann M, Hartl FU, Kerner MJ, Frishman D (2008). "Protein abundance profiling of the Escherichia coli cytosol." BMC Genomics 9;102. PMID: 18304323

Loiseau07: Loiseau L, Gerez C, Bekker M, Ollagnier-de Choudens S, Py B, Sanakis Y, Teixeira de Mattos J, Fontecave M, Barras F (2007). "ErpA, an iron sulfur (Fe S) protein of the A-type essential for respiratory metabolism in Escherichia coli." Proc Natl Acad Sci U S A 104(34);13626-31. PMID: 17698959

LopezCampistrou05: Lopez-Campistrous A, Semchuk P, Burke L, Palmer-Stone T, Brokx SJ, Broderick G, Bottorff D, Bolch S, Weiner JH, Ellison MJ (2005). "Localization, annotation, and comparison of the Escherichia coli K-12 proteome under two states of growth." Mol Cell Proteomics 4(8);1205-9. PMID: 15911532

Pinske12: Pinske C, Sawers RG (2012). "A-type carrier protein ErpA is essential for formation of an active formate-nitrate respiratory pathway in Escherichia coli K-12." J Bacteriol 194(2);346-53. PMID: 22081393

Pinske12a: Pinske C, Sawers RG (2012). "Delivery of Iron-Sulfur Clusters to the Hydrogen-Oxidizing [NiFe]-Hydrogenases in Escherichia coli Requires the A-Type Carrier Proteins ErpA and IscA." PLoS One 7(2);e31755. PMID: 22363723

Py10: Py B, Barras F (2010). "Building Fe-S proteins: bacterial strategies." Nat Rev Microbiol 8(6);436-46. PMID: 20467446

Serres01: Serres MH, Gopal S, Nahum LA, Liang P, Gaasterland T, Riley M (2001). "A functional update of the Escherichia coli K-12 genome." Genome Biol 2(9);RESEARCH0035. PMID: 11574054

UniProt10a: UniProt Consortium (2010). "UniProt version 2010-07 released on 2010-06-15 00:00:00." Database.

UniProt11: UniProt Consortium (2011). "UniProt version 2011-06 released on 2011-06-30 00:00:00." Database.

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

Vinella09: Vinella D, Brochier-Armanet C, Loiseau L, Talla E, Barras F (2009). "Iron-sulfur (Fe/S) protein biogenesis: phylogenomic and genetic studies of A-type carriers." PLoS Genet 5(5);e1000497. PMID: 19478995

Other References Related to Gene Regulation

Wright13: Wright PR, Richter AS, Papenfort K, Mann M, Vogel J, Hess WR, Backofen R, Georg J (2013). "Comparative genomics boosts target prediction for bacterial small RNAs." Proc Natl Acad Sci U S A 110(37);E3487-96. PMID: 23980183

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 Wed Oct 7, 2015, biocyc13.