Escherichia coli K-12 substr. MG1655 Polypeptide: putrescine ABC transporter - ATP binding subunit

Gene: potG Accession Numbers: EG11630 (EcoCyc), b0855, ECK0846

Regulation Summary Diagram: ?

Regulation summary diagram for potG

Component of: putrescine ABC transporter (extended summary available)

Gene Citations: [Pistocchi93]

Locations: cytosol, inner membrane

Map Position: [894,214 -> 895,347] (19.27 centisomes, 69°)
Length: 1134 bp / 377 aa

Molecular Weight of Polypeptide: 41.931 kD (from nucleotide sequence)

Unification Links: ASAP:ABE-0002915 , CGSC:31697 , DIP:DIP-10532N , EchoBASE:EB1587 , EcoGene:EG11630 , EcoliWiki:b0855 , ModBase:P31134 , OU-Microarray:b0855 , PortEco:potG , Pride:P31134 , Protein Model Portal:P31134 , RefSeq:NP_415376 , RegulonDB:EG11630 , SMR:P31134 , String:511145.b0855 , UniProt:P31134

Relationship Links: InterPro:IN-FAMILY:IPR003439 , InterPro:IN-FAMILY:IPR003593 , InterPro:IN-FAMILY:IPR005893 , InterPro:IN-FAMILY:IPR008995 , InterPro:IN-FAMILY:IPR013611 , InterPro:IN-FAMILY:IPR017871 , InterPro:IN-FAMILY:IPR027417 , Pfam:IN-FAMILY:PF00005 , Pfam:IN-FAMILY:PF08402 , Prosite:IN-FAMILY:PS00211 , Prosite:IN-FAMILY:PS50893 , Smart:IN-FAMILY:SM00382

In Paralogous Gene Group: 23 (75 members)

Gene-Reaction Schematic: ?

Gene-Reaction Schematic

Genetic Regulation Schematic: ?

Genetic regulation schematic for potG

GO Terms:

Biological Process: GO:0015847 - putrescine transport Inferred from experiment [Pistocchi93]
GO:0006810 - transport Inferred by computational analysis [UniProtGOA11]
GO:0008152 - metabolic process Inferred by computational analysis [GOA01]
GO:0055085 - transmembrane transport Inferred by computational analysis [GOA01]
GO:1902047 - polyamine transmembrane transport Inferred by computational analysis [GOA01]
Molecular Function: GO:0015594 - putrescine-importing ATPase activity Inferred by computational analysis Inferred from experiment [Pistocchi93]
GO:0000166 - nucleotide binding Inferred by computational analysis [UniProtGOA11]
GO:0005524 - ATP binding Inferred by computational analysis [UniProtGOA11, GOA01, Pistocchi93]
GO:0015417 - polyamine-transporting ATPase activity Inferred by computational analysis [GOA01]
GO:0016820 - hydrolase activity, acting on acid anhydrides, catalyzing transmembrane movement of substances Inferred by computational analysis [GOA01]
GO:0016887 - ATPase activity Inferred by computational analysis [GOA01]
Cellular Component: GO:0005737 - cytoplasm Inferred by computational analysis [Pistocchi93]
GO:0005829 - cytosol Inferred by computational analysis [DiazMejia09]
GO:0005886 - plasma membrane Inferred by computational analysis [UniProtGOA11a, UniProtGOA11]
GO:0016020 - membrane Inferred by computational analysis [UniProtGOA11]
GO:0043190 - ATP-binding cassette (ABC) transporter complex Inferred by computational analysis [GOA01, Pistocchi93]

MultiFun Terms: metabolism carbon utilization amines
transport Channel-type Transporters Pyrophosphate Bond (ATP; GTP; P2) Hydrolysis-driven Active Transporters The ATP-binding Cassette (ABC) Superfamily + ABC-type Uptake Permeases ABC superfamily ATP binding cytoplasmic component

Essentiality data for potG 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]
Yes [Feist07, Comment 4]

Subunit of: putrescine ABC transporter

Subunit composition of putrescine ABC transporter = [PotG]2[PotH][PotI][PotF]
         putrescine ABC transporter - ATP binding subunit = PotG
         putrescine ABC transporter - membrane subunit = PotH
         putrescine ABC transporter - membrane subunit = PotI
         putrescine ABC transporter - periplasmic binding protein = PotF

The PotFGHI ATP-dependent putrescine transporter is a member of the ATP Binding Cassette (ABC) Superfamily of transporters [Wu95]. PotFGHI is similar in sequence and subunit composition to the PotABCD putrescine/spermidine uptake system. Based on sequence similarity, PotG is the ATP-binding component, PotH and PotI are the membrane components, and PotF is the periplasmic binding component of the ABC transporter. Knockout and complementation studies showed that the expression of all four proteins was necessary for maximal putrescine transport activity [Pistocchi93]. The PotFGHI transporter is primarily responsible for importing putrescine necessary for cell growth in the presence of glucose whereas the putrescine symporter, PuuP, is required when putrescine is utilised as an energy source in the absence of glucose [Terui13].

Gradual inhibition of PotFGHI mediated putrescine transport occurs as the intracellular level of putrescine increases. PotFGHI enhances cell growth more effectively than PuuP in media containing 0.4% glucose and 10mM putrescine [Terui13].

The PotF protein possesses a high binding affinity to putrescine (Kd=2.0 μM) [Vassylyev98]. Site-directed mutagenesis have shown that PotF is the putrescine-binding protein [Vassylyev98], and gel filtration studies have show that in the presence of 1mM magnesium ion and 100mM potassium ion, PotF bound putrescine, but not spermidine, in a 1:1 ratio [Pistocchi93]. A high resolution structure of PotF has been determined by x-ray crystallography [Vassylyev98].

In addition to PotFGHI, PuuP and the spermidine preferential ABC transporter (PotABCD), E. coli K-12 may contain a fourth putrescine uptake system [Terui13].

Locations: inner membrane

GO Terms:

Biological Process: GO:0015847 - putrescine transport Inferred from experiment [Pistocchi93]
Molecular Function: GO:0015594 - putrescine-importing ATPase activity Inferred by computational analysis Inferred from experiment [Pistocchi93]
Cellular Component: GO:0043190 - ATP-binding cassette (ABC) transporter complex Inferred by computational analysis [Pistocchi93]

Enzymatic reaction of: transport of putresince (putrescine ABC transporter)

Synonyms: Transport of putrescine

EC Number:

Transport reaction diagram for transport of putresince

Kinetic Parameters:

Km (μM)
Vmax (µmol mg-1 min-1)

Sequence Features

Protein sequence of putrescine ABC transporter - ATP binding subunit with features indicated

Feature Class Location Citations Comment
Conserved-Region 20 -> 250
UniProt: ABC transporter;
Nucleotide-Phosphate-Binding-Region 52 -> 59
UniProt: ATP; Non-Experimental Qualifier: potential;

Gene Local Context (not to scale): ?

Gene local context diagram

Transcription Units:

Transcription-unit diagram

Transcription-unit diagram


Peter D. Karp on Wed Jan 18, 2006:
Gene left-end position adjusted based on analysis performed in the 2005 E. coli annotation update [Riley06 ].
10/20/97 Gene b0855 from Blattner lab Genbank (v. M52) entry merged into EcoCyc gene EG11630; 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

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

Feist07: Feist AM, Henry CS, Reed JL, Krummenacker M, Joyce AR, Karp PD, Broadbelt LJ, Hatzimanikatis V, Palsson BO (2007). "A genome-scale metabolic reconstruction for Escherichia coli K-12 MG1655 that accounts for 1260 ORFs and thermodynamic information." Mol Syst Biol 3;121. PMID: 17593909

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

Pistocchi93: Pistocchi R, Kashiwagi K, Miyamoto S, Nukui E, Sadakata Y, Kobayashi H, Igarashi K (1993). "Characteristics of the operon for a putrescine transport system that maps at 19 minutes on the Escherichia coli chromosome." J Biol Chem 1993;268(1);146-52. PMID: 8416922

Riley06: Riley M, Abe T, Arnaud MB, Berlyn MK, Blattner FR, Chaudhuri RR, Glasner JD, Horiuchi T, Keseler IM, Kosuge T, Mori H, Perna NT, Plunkett G, Rudd KE, Serres MH, Thomas GH, Thomson NR, Wishart D, Wanner BL (2006). "Escherichia coli K-12: a cooperatively developed annotation snapshot--2005." Nucleic Acids Res 34(1);1-9. PMID: 16397293

Terui13: Terui Y, Saroj SD, Sakamoto A, Yoshida T, Higashi K, Kurihara S, Suzuki H, Toida T, Kashiwagi K, Igarashi K (2013). "Properties of putrescine uptake by PotFGHI and PuuP and their physiological significance in Escherichia coli." Amino Acids. PMID: 23719730

UniProt09: UniProt Consortium (2009). "UniProt version 15.8 released on 2009-10-01 00:00:00." Database.

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

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

UniProtGOA11a: UniProt-GOA (2011). "Gene Ontology annotation based on the manual assignment of UniProtKB Subcellular Location terms in UniProtKB/Swiss-Prot entries."

Vassylyev98: Vassylyev DG, Tomitori H, Kashiwagi K, Morikawa K, Igarashi K (1998). "Crystal structure and mutational analysis of the Escherichia coli putrescine receptor. Structural basis for substrate specificity." J Biol Chem 1998;273(28);17604-9. PMID: 9651355

Wu95: Wu LF, Mandrand-Berthelot MA (1995). "A family of homologous substrate-binding proteins with a broad range of substrate specificity and dissimilar biological functions." Biochimie 1995;77(9);744-50. PMID: 8789466

Other References Related to Gene Regulation

Barrios99: Barrios H, Valderrama B, Morett E (1999). "Compilation and analysis of sigma(54)-dependent promoter sequences." Nucleic Acids Res 27(22);4305-13. PMID: 10536136

Reitzer01: Reitzer L, Schneider BL (2001). "Metabolic context and possible physiological themes of sigma(54)-dependent genes in Escherichia coli." Microbiol Mol Biol Rev 65(3);422-44, table of contents. PMID: 11528004

Zimmer00: Zimmer DP, Soupene E, Lee HL, Wendisch VF, Khodursky AB, Peter BJ, Bender RA, Kustu S (2000). "Nitrogen regulatory protein C-controlled genes of Escherichia coli: scavenging as a defense against nitrogen limitation." Proc Natl Acad Sci U S A 97(26);14674-9. PMID: 11121068

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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, biocyc14.