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On One Page

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Product(s) |

Expression|

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Standard Name	lacA
Gene Synonym(s)	ECK0339, b0342, JW0333^[1], JW0333
Product Desc.	galactoside O-acetyltransferase^[2]^[3]; Component of galactoside O-acetyltransferase^[2]^[3] Thiogalactoside acetyltransferase^[4]
Product Synonyms(s)	thiogalactoside acetyltransferase^[1], B0342^[2]^[1], LacA^[2]^[1] , ECK0339, JW0333, b0342
Function from GO	<GO_nr />
Knock-Out Phenotype
Regulation/Expression	transcription unit(s): lacZYA^[2], lacZ, OP00045, lacAYZ
Regulation/Activity
Quick Links
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Notes

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LacA contains 8 hexapeptide repeats. The initiator methionine is only partially cleaved (Fowler, 1985). LacA confers selective advantage to cells growing on beta-galactosides in the presence of non-metabolizable analogs, presumably by acetylating the analogs and blocking their uptake (Andrews, 1976).^[4]

Gene

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Nomenclature

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See Help:Gene_nomenclature for help with entering information in the Gene Nomenclature table.

Standard name	lacA
Mnemonic	Lactose
Synonyms	ECK0339, b0342, JW0333^[1], JW0333
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Notes

Location(s) and DNA Sequence

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<protect> See Help:Gene_location for help entering information in the Gene Location and DNA sequence table.

Strain	Map location	Genome coordinates	Genome browsers	Sequence links
MG1655	7.77 minutes	MG1655: 361084..360473 <gbrowseImage> name=NC_000913:360473..361084 source=MG1655 preset=GeneLocation </gbrowseImage>	EcoCyc GBrowse(MG1655)	FASTA Dump EcoCyc Sequence Dump
REL606		NC_012967: 334416..333805 <gbrowseImage> name=NC_012967:333805..334416 source=REL606 preset=GeneLocation </gbrowseImage>	GBrowse (REL606)	FASTA Dump
BW2952		NC_012759: 4174099..4174434 <gbrowseImage> name=NC_012759:4174099..4174434 source=BW2952 preset=GeneLocation </gbrowseImage>	GBrowse (BW2952)	FASTA Dump
W3110		W3110: 361084..360473 <gbrowseImage> name=NC_007779:360473..361084 source=W3110 preset=GeneLocation </gbrowseImage>	GBrowse(W3110)	FASTA Dump
DH10B		DH10B: 1380620..1380009 <gbrowseImage> name=NC_010473:1380009..1380620 source=DH10B preset=GeneLocation </gbrowseImage>	GBrowse(DH10B)	FASTA Dump
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Notes

Sequence Features

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See Help:Gene_sequence_features for help in entering sequence features in EcoliWiki.

Feature Type	Strain	Genomic Location	Evidence	Reference	Notes
Coding Start (SO:0000323)	MG1655	360473	Edman degradation	PMID:3922433
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Notes

Alleles and Phenotypes

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See Help:Gene_alleles for how to enter or edit alleles and phenotypes in EcoliWiki.

Allele	Nt change(s)	AA change(s)	Phenotype: Type	Phenotype: Description	Reference	Availability	Comments
lacA(del) (Keio:JW0333)	deletion	deletion			PMID:16738554	Shigen
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Notes

Genetic Interactions

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Interactor	Interaction	Allele	Score(s)	Reference(s)	Accessions	Notes
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Notes

Genetic Resources

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See Help:Gene_resources for help entering information into the Genetic Resources table.

Resource	Resource Type	Source	Notes/Reference
JW0333	Plasmid clone	Shigen	PMID:16769691 Status:Clone OK Primer 1:GCCAACATGCCAATGACCGAAAG Primer 2:CCAACTGACGATTCAACTTTATA
10A6	Kohara Phage	Genobase	PMID:3038334
proA81::Tn10	Linked marker	CAG18447 = CGSC7330^[5]	est. P1 cotransduction: % ^[6]
lacI3042::Tn10	Linked marker	CAG18439 = CGSC7334^[5]	est. P1 cotransduction: 82% ^[6] Synonyms:lacI42::Tn10 nnnCAG18439 also carries lacZ118(0c) (CGSC).
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Notes

Accessions in Other Databases

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See Help:Gene_accessions for help with entering information into the Gene Accessions table.

Database	Accession	Notes
EcoCyc	EcoCyc:EG10524	Escherichia coli str. K-12 substr. MG1655
EcoGene	EcoGene:EG10524	Escherichia coli str. K-12 substr. MG1655
RegulonDB	RegulonDB:ECK120000517	Escherichia coli str. K-12 substr. MG1655
NCBI (EcoliWiki Page)	GeneID:945674	Escherichia coli str. K-12 substr. MG1655
EchoBASE	EchoBASE:EB0519	Escherichia coli str. K-12 substr. MG1655
ASAP	ASAP:ABE-0001177	Escherichia coli str. K-12 substr. MG1655
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Notes

Links

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Name	URL	Comments
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Product(s)

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Nomenclature

See Help:Product_nomenclature for help entering or editing information in this section of EcoliWiki.

Standard name	LacA
Synonyms	thiogalactoside acetyltransferase^[1], B0342^[2]^[1], LacA^[2]^[1] , ECK0339, JW0333, b0342
Product description	galactoside O-acetyltransferase^[2]^[3]; Component of galactoside O-acetyltransferase^[2]^[3] Thiogalactoside acetyltransferase^[4]
EC number (for enzymes)	2.3.1.18^[1]
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Notes

Function

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<protect> Gene Ontology
See Help:Gene_ontology for help entering or editing GO terms and GO annotations in EcoliWiki.

Qualifier	GO ID	GO term name	Reference	Evidence Code	with/from	Aspect	Notes	Status
	GO:0005737	cytoplasm	GOA:spkw SP_KW:GO_REF:0000004	IEA: Inferred from Electronic Annotation	SP_KW:KW-0963	C	Seeded from EcoCyc (v14.0)	complete
	GO:0005737	cytoplasm	GO_REF:0000023	IEA: Inferred from Electronic Annotation	SP_SL:SL-0086	C	Seeded from EcoCyc (v14.0)	complete
	GO:0005989	lactose biosynthetic process	GOA:spkw SP_KW:GO_REF:0000004	IEA: Inferred from Electronic Annotation	SP_KW:KW-0422	P	Seeded from EcoCyc (v14.0)	complete
	GO:0008415	acyltransferase activity	GOA:spkw SP_KW:GO_REF:0000004	IEA: Inferred from Electronic Annotation	SP_KW:KW-0012	F	Seeded from EcoCyc (v14.0)	complete
	GO:0008870	galactoside O-acetyltransferase activity	GOA:spec GO_REF:0000003	IEA: Inferred from Electronic Annotation	EC:2.3.1.18	F	Seeded from EcoCyc (v14.0)	complete
	GO:0016740	transferase activity	GOA:interpro GO_REF:0000002	IEA: Inferred from Electronic Annotation	InterPro:IPR001451	F	Seeded from EcoCyc (v14.0)	complete
	GO:0016740	transferase activity	GOA:interpro GO_REF:0000002	IEA: Inferred from Electronic Annotation	InterPro:IPR011004	F	Seeded from EcoCyc (v14.0)	complete
	GO:0016740	transferase activity	GOA:interpro GO_REF:0000002	IEA: Inferred from Electronic Annotation	InterPro:IPR018357	F	Seeded from EcoCyc (v14.0)	complete
	GO:0016740	transferase activity	GOA:spkw SP_KW:GO_REF:0000004	IEA: Inferred from Electronic Annotation	SP_KW:KW-0808	F	Seeded from EcoCyc (v14.0)	complete
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Interactions See Help:Product_interactions for help entering or editing information about gene product interactions in this section of EcoliWiki.

Partner Type	Partner	Notes	References	Evidence
Protein	Subunits of galactoside O-acetyltransferase	could be indirect
Protein	dnaK		PMID:16606699	Experiment(s):EBI-1136301
Protein	prs		PMID:16606699	Experiment(s):EBI-1136301
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Notes

Localization

See Help:Product_localization for how to add or edit information in this section of EcoliWiki.

Compartment	Description	Evidence	Reference/Source	Notes
cytoplasm			From EcoCyc^[3]
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Notes

Structure and Physical Properties

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<protect> Physical Properties See Help:Product_physical_properties for help entering or editing information about the physical properties of this gene product.

Name
Sequence	at EcoCyc MNMPMTERIR AGKLFTDMCE GLPEKRLRGK TLMYEFNHSH PSEVEKRESL IKEMFATVGE NAWVEPPVYF SYGSNIHIGR NFYANFNLTI VDDYTVTIGD NVLIAPNVTL SVTGHPVHHE LRKNGEMYSF PITIGNNVWI GSHVVINPGV TIGDNSVIGA GSIVTKDIPP NVVAAGVPCR VIREINDRDK HYYFKDYKVE SSV
Length	203
Mol. Wt	22.798 kDa
pI	6.7 (calculated)
Extinction coefficient	24,410 - 24,660 (calc based on 9 Y, 2 W, and 2 C residues)
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Domains/Motifs/Modification Sites

See Help:Product_domains_motifs for help entering or editing information in this section of EcoliWiki.

Type	Residues	Description	References
Domain	95..111	PF00132 Bacterial transferase hexapeptide (three repeats)	PMID:19920124
Domain	6..60	PF12464 Maltose acetyltransferase	PMID:19920124
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<motif_map/>

Structure
See Help:Product_structure for help entering or editing information in this section of EcoliWiki.

Structures

<beststructure> gene=lacA taxon=562,83333 </beststructure>

Models

View models at:

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Structure figures

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Notes

Gene Product Resources

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See Help:Product_resources for help with entering or editing information in this section of EcoliWiki.

Resource type	Source	Notes/Reference
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Notes

Accessions in Other Databases

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See Help:Gene_accessions for help with entering information into the Gene Accessions table.

Database	Accession	Notes
NCBI (Protein) (EcoliWiki Page)	GI:16128327	Escherichia coli str. K-12 substr. MG1655
NCBI (Protein) (EcoliWiki Page)	GeneID:945674	Escherichia coli str. K-12 substr. MG1655
ASAP	ASAP:ABE-0001177	Escherichia coli str. K-12 substr. MG1655
UniProt (EcoliWiki Page)	UniProtKB/Swiss-Prot:P07464	Escherichia coli str. K-12 substr. MG1655
EcoCyc	EcoCyc:EG10524	Escherichia coli str. K-12 substr. MG1655
EcoGene	EcoGene:EG10524	Escherichia coli str. K-12 substr. MG1655
NCBI (Gene) (EcoliWiki Page)	GeneID:945674	Escherichia coli str. K-12 substr. MG1655
RegulonDB	RegulonDB:ECK120000517	Escherichia coli str. K-12 substr. MG1655
EchoBASE	EchoBASE:EB0519	Escherichia coli str. K-12 substr. MG1655
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Notes

Links

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Name	URL	Comments
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Expression

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Overview

This is a placeholder for a summary statement on how expression of this gene product is regulated. You can help EcoliWiki by becoming a user and writing/editing this statement.

Cellular Levels

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See Help:Cellular levels

Molecule	Organism or Strain	Value	Units	Experimental Conditions	Assay used	Notes	Reference(s)
Protein	E. coli K-12 MG1655	17^a	molecules/cell/generation	Medium: MOPS Complete Temperature (°C): 37 Doubling time (min): *Growth phase: OD: other:	Ribosome Profiling	Low confidence in the sequencing data set.	PMID: 24766808
Protein	E. coli K-12 MG1655	24	molecules/cell/generation	Medium: MOPS Minimal Temperature (°C): 37 Doubling time (min): *Growth phase: OD: other:	Ribosome Profiling		PMID: 24766808
Protein	E. coli K-12 MG1655	3^a	molecules/cell/generation	Medium: MOPS Complete without Methionine Temperature (°C): 37 Doubling time (min): *Growth phase: OD: other:	Ribosome Profiling	Low confidence in the sequencing data set.	PMID: 24766808
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Notes

Transcription and Transcriptional Regulation

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See Help:Expression_transcription for help entering or editing information in this section of EcoliWiki.

Transcription unit(s)
lacZYA
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Figure courtesy of RegulonDB

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Notes

This is a placeholder for a summary statement about how transcription of this gene is regulated. You can help EcoliWiki by becoming a user and writing/editing this statement.

Translation and Regulation of Translation

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<protect><gbrowseImage> name=NC_000913:361064..361104 source=MG1655 flip=1 type=Gene+DNA_+Protein preset=Nterminus </gbrowseImage> This picture shows the sequence around the N-terminus.

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Notes

This is a placeholder for a summary statement about how translation of this gene product is regulated. You can help EcoliWiki by becoming a user and writing/editing this statement.

Turnover and Regulation of Turnover

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Notes

This is a placeholder for a summary statement about turnover of this gene product. You can help EcoliWiki by becoming a user and writing/editing this statement.

Experimental

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<protect> Mutations Affecting Expression See Help:Expression_mutations for help entering or editing information in this section of EcoliWiki.

Allele Name	Mutation	Phenotype	Reference
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Expression Studies See Help:Expression_studies for help entering or editing information in this section of EcoliWiki.

Type	Reference	Notes
microarray	GEO Profiles:b0342 (EcoliWiki Page)	NCBI GEO profiles for lacA
microarray	GenExpDB:b0342 (EcoliWiki Page)	Summary of data for lacA from multiple microarray studies
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Expression Resources See Help:Expression_resources for help entering or editing information in this section of EcoliWiki.

Resource Name	Resource Type	Description	Source	Notes
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Notes

Accessions Related to lacA Expression

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See Help:Gene_accessions for help with entering information into the Gene Accessions table.

Database	Accession	Notes
EcoCyc	EcoCyc:EG10524	Escherichia coli str. K-12 substr. MG1655
EchoBASE	EchoBASE:EB0519	Escherichia coli str. K-12 substr. MG1655
EcoliGenExpDB (EcoliWiki Page)	EcoliGenExpDB:b0342
EcoGene	EcoGene:EG10524	Escherichia coli str. K-12 substr. MG1655
RegulonDB	RegulonDB:ECK120000517	Escherichia coli str. K-12 substr. MG1655
ASAP	ASAP:ABE-0001177	Escherichia coli str. K-12 substr. MG1655
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Notes

Links

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Name	URL	Comments
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Evolution

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Homologs in Other Organisms

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See Help:Evolution_homologs for help entering or editing information in this section of EcoliWiki.

Organism	Homologs (Statistics)	Comments
Saccharomyces cerevisiae	YJL218W (score: 1.000; bootstrap: 100%)	From Inparanoid:20070104
E. coli O157	LACA	From ECOO157CYC
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Do-It-Yourself Web Tools

Notes

Families

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See Help:Gene_accessions for help with entering information into the Gene Accessions table.

Database	Accession	Notes
Pfam (EcoliWiki Page)	PF00132 Bacterial transferase hexapeptide (three repeats)
Superfamily (EcoliWiki Page)	SUPERFAMILY:51161
Panther (EcoliWiki Page)	PTHR23416:SF26
Pfam (EcoliWiki Page)	PF12464 Maltose acetyltransferase
EcoCyc	EcoCyc:EG10524	Escherichia coli str. K-12 substr. MG1655
EcoGene	EcoGene:EG10524	Escherichia coli str. K-12 substr. MG1655
RegulonDB	RegulonDB:ECK120000517	Escherichia coli str. K-12 substr. MG1655
EchoBASE	EchoBASE:EB0519	Escherichia coli str. K-12 substr. MG1655
ASAP	ASAP:ABE-0001177	Escherichia coli str. K-12 substr. MG1655
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Notes

Links

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Name	URL	Comments
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References

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See Help:References for how to manage references in EcoliWiki.

↑ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 ^1.6 ^1.7 ^1.8 Riley, M. et al. (2006) Nucleic Acids Res 34:1-6 (corrected supplemental data from B. Wanner)
↑ ^2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 ^2.6 ^2.7 ^2.8 EcoCyc (release 10.6; 2007) Keseler, IM et al. (2005) Nucleic Acids Res. 33(Database issue):D334-7
↑ ^3.0 ^3.1 ^3.2 ^3.3 ^3.4 EcoCyc (release 11.1; 2007) Keseler, IM et al. (2005) Nucleic Acids Res. 33(Database issue):D334-7
↑ ^4.0 ^4.1 ^4.2 EcoGene: Rudd, KE (2000) EcoGene: a genome sequence database for Escherichia coli K-12. Nucleic Acids Res 28:60-4.
↑ ^5.0 ^5.1 CGSC: The Coli Genetics Stock Center
↑ ^6.0 ^6.1 The Tn10 insertion sites determined by Nichols et al. 1998 (PMID:9829956) were reannotated by alignment with E. coli K-12 genome sequence (GenBank accession NC_000913). P1 contransduction frequencies were calculated using the formula of Wu (PMID:5338813).

lacA:On One Page

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Notes

Gene

Nomenclature

Notes

Location(s) and DNA Sequence

Notes

Sequence Features

Notes

Alleles and Phenotypes

Notes

Genetic Interactions

Notes

Genetic Resources

Notes

Accessions in Other Databases

Notes

Links

Product(s)

Nomenclature

Notes

Function

Notes

Localization

Notes

Structure and Physical Properties

Structure figures

Notes

Gene Product Resources

Notes

Accessions in Other Databases

Notes

Links

Expression

Overview

Cellular Levels

Notes

Transcription and Transcriptional Regulation

Notes

Translation and Regulation of Translation

Notes

Turnover and Regulation of Turnover

Notes

Experimental

Notes

Accessions Related to lacA Expression

Notes

Links

Evolution

Homologs in Other Organisms

Do-It-Yourself Web Tools

Notes

Families

Notes

Links

References

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