Escherichia coli K-12 substr. MG1655 Polypeptide: fimbrial usher protein, N-terminal fragment

Gene: yfcU Accession Numbers: G7209 (EcoCyc), b2338, ECK2332

Regulation Summary Diagram: ?

Regulation summary diagram for yfcU

Sequence analysis indicates that the b2337 gene (yfcT) and the b2338 gene (yfcU) are two parts of a putative fimbrial usher protein interrupted by a stop codon. The yfcTU genes are found in a predicted operon with other putative fimbrial genes and have sequence similarity with fimbrial usher proteins [Korea10]. yfcOPQRSTUV is cryptic under normal laboratory conditions but when constitutive expression is induced in a strain that lacks the type 1 fimbrial complex the yfc operon promotes adhesion to eukaryotic epithelial cells (T4 bladder cells) [Korea10]. Expression of the yfc operon is regulated by the global regulators H-NS and CRP cAMP [Korea10].

This operon has a high degree of similarity in both sequence and organization to an operon found in Salmonella typhimurium, discovered by genomic subtractive hybridization as absent in Salmonella typhi [Morrow99].

A yfcU mutation has been isolated from an E. coli B strain evolved under conditions of minimal medium with a glucose carbon source [Schneider00b].

Citations: [Korea11]

Locations: outer membrane

Map Position: [2,451,287 <- 2,453,023] (52.83 centisomes, 190°)
Length: 1737 bp / 578 aa

Molecular Weight of Polypeptide: 65.302 kD (from nucleotide sequence)

Unification Links: ASAP:ABE-0007713 , EchoBASE:EB4380 , EcoliWiki:b2338 , OU-Microarray:b2338 , PortEco:yfcU , RefSeq:YP_026167 , RegulonDB:G7209

Relationship Links: EcoGene:RELATED-TO:EG14124 , Pfam:IN-FAMILY:PF00577 , UniProt:RELATED-TO:P77196

In Paralogous Gene Group: 43 (37 members)

GO Terms:

Biological Process: GO:0006810 - transport Inferred by computational analysis [UniProtGOA11a, GOA01a]
GO:0043711 - pilus organization Inferred by computational analysis [Korea10]
Molecular Function: GO:0005215 - transporter activity Inferred by computational analysis [GOA01a]
GO:0015473 - fimbrial usher porin activity Inferred by computational analysis [Korea10]
Cellular Component: GO:0009279 - cell outer membrane Inferred by computational analysis [UniProtGOA11, UniProtGOA11a, DiazMejia09]
GO:0016020 - membrane Inferred by computational analysis [UniProtGOA11a, GOA01a]
GO:0016021 - integral component of membrane Inferred by computational analysis [UniProtGOA11a]

Gene Class: All-Genes Pseudo-Genes Interrupted-Genes
Genes ORFs Conserved-ORFs

Essentiality data for yfcU 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 ? 14-Apr-2010 by Mackie A , Macquarie University

Sequence Features

Protein sequence of fimbrial usher protein, N-terminal fragment with features indicated

Feature Class Location Citations Comment
Signal-Sequence 1 -> 29
UniProt: Non-Experimental Qualifier: potential;

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

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

GOA01a: 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

Korea10: Korea CG, Badouraly R, Prevost MC, Ghigo JM, Beloin C (2010). "Escherichia coli K-12 possesses multiple cryptic but functional chaperone-usher fimbriae with distinct surface specificities." Environ Microbiol 12(7):1957-77. PMID: 20345943

Korea11: Korea CG, Ghigo JM, Beloin C (2011). "The sweet connection: Solving the riddle of multiple sugar-binding fimbrial adhesins in Escherichia coli: Multiple E. coli fimbriae form a versatile arsenal of sugar-binding lectins potentially involved in surface-colonisation and tissue tropism." Bioessays 33(4);300-11. PMID: 21344461

Morrow99: Morrow BJ, Graham JE, Curtiss R (1999). "Genomic subtractive hybridization and selective capture of transcribed sequences identify a novel Salmonella typhimurium fimbrial operon and putative transcriptional regulator that are absent from the Salmonella typhi genome." Infect Immun 67(10);5106-16. PMID: 10496884

Schneider00b: Schneider D, Duperchy E, Coursange E, Lenski RE, Blot M (2000). "Long-term experimental evolution in Escherichia coli. IX. Characterization of insertion sequence-mediated mutations and rearrangements." Genetics 156(2);477-88. PMID: 11014799

UniProt10: 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 the manual assignment of UniProtKB Subcellular Location terms in UniProtKB/Swiss-Prot entries."

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

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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, biocyc13.