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On One Page

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Gene |

Product(s) |

Expression|

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Standard Name	mdaB
Gene Synonym(s)	ECK3019, b3028, JW2996, mda66^[1], mda66
Product Desc.	EG12656^[2]^[3]; Component of quinone reductase^[3] FMN-dependent NADH-quinone reductase; MdaB and YgiN form an enzymatic quinone reduction-oxidation cycle in vitro; possibly mitigates toxicity of quinols and quinones in vivo; dimeric^[4]
Product Synonyms(s)	NADPH quinone reductase^[1], B3028^[2]^[1], MdaB^[2]^[1] , ECK3019, JW2996, mda66, b3028
Function from GO	<GO_nr />
Knock-Out Phenotype
Regulation/Expression	transcription unit(s): mdaB^[2]
Regulation/Activity
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Notes

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MdaB overexpression results in resistance to cytotoxic drugs including adriamycin, etoposide and the tumoricidal agent DMP 840. Induced 25-fold by 2-methylene-4-butyrolactone and 2-methyl-1,4-naphthoquinone (menadione). mdaB is in an operon with ygiN. Reduces menadione to menadiol. May have some nitroreductase activity. Paradoxically also reported to be NADPH-specific.^[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	mdaB
Mnemonic	Modulator of drug activity
Synonyms	ECK3019, b3028, JW2996, mda66^[1], mda66
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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	68.34 minutes	MG1655: 3170552..3171133 <gbrowseImage> name=NC_000913:3170552..3171133 source=MG1655 preset=GeneLocation </gbrowseImage>	EcoCyc GBrowse(MG1655)	FASTA Dump EcoCyc Sequence Dump
REL606		NC_012967: 3106702..3107283 <gbrowseImage> name=NC_012967:3106702..3107283 source=REL606 preset=GeneLocation </gbrowseImage>	GBrowse (REL606)	FASTA Dump
BW2952		NC_012759: 3057700..3058281 <gbrowseImage> name=NC_012759:3057700..3058281 source=BW2952 preset=GeneLocation </gbrowseImage>	GBrowse (BW2952)	FASTA Dump
W3110		W3110: 3171186..3171767 <gbrowseImage> name=NC_007779:3171186..3171767 source=W3110 preset=GeneLocation </gbrowseImage>	GBrowse(W3110)	FASTA Dump
DH10B		DH10B: 3268297..3268878 <gbrowseImage> name=NC_010473:3268297..3268878 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	3170555	Edman degradation	PMID:8611590
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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)	Reference	Availability	Comments
ΔmdaB (Keio:JW2996)	deletion	deletion	PMID:16738554	Shigen CGSC10297^[5]
mdaB::Tn5KAN-I-SceI (FB21011)	Insertion at nt 285 in Minus orientation		PMID:15262929	E. coli Genome Project:FB21011	does not contain pKD46
mdaB::Tn5KAN-I-SceI (FB21012)	Insertion at nt 285 in Minus orientation		PMID:15262929	E. coli Genome Project:FB21012	contains pKD46
ΔmdaB726::kan			PMID:16738554	CGSC:101772
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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
JW2996	Plasmid clone	Shigen	PMID:16769691 Status:Clone OK Primer 1:GCCAGCAACATCCTGATTATCAA Primer 2:CCACCAAAAATTTCCACAAGATG
17B2	Kohara Phage	Genobase	PMID:3038334
6B12	Kohara Phage	Genobase	PMID:3038334
metC162::Tn10	Linked marker	CAG18475 = CGSC7435^[5]	est. P1 cotransduction: 48% ^[6]
tolC210::Tn10	Linked marker	CAG12184 = CGSC7437^[5]	est. P1 cotransduction: 77% ^[6]
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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:EG12656	Escherichia coli str. K-12 substr. MG1655
EcoGene	EcoGene:EG12656	Escherichia coli str. K-12 substr. MG1655
RegulonDB	RegulonDB:ECK120002346	Escherichia coli str. K-12 substr. MG1655
NCBI (EcoliWiki Page)	GeneID:947512	Escherichia coli str. K-12 substr. MG1655
EchoBASE	EchoBASE:EB2524	Escherichia coli str. K-12 substr. MG1655
ASAP	ASAP:ABE-0009946	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	MdaB
Synonyms	NADPH quinone reductase^[1], B3028^[2]^[1], MdaB^[2]^[1] , ECK3019, JW2996, mda66, b3028
Product description	EG12656^[2]^[3]; Component of quinone reductase^[3] FMN-dependent NADH-quinone reductase; MdaB and YgiN form an enzymatic quinone reduction-oxidation cycle in vitro; possibly mitigates toxicity of quinols and quinones in vivo; dimeric^[4]
EC number (for enzymes)	1.6.99.6^[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				C	Seeded from Riley et al 2006 ^[1].	Missing: evidence, reference
	GO:0009055	electron carrier activity	GOA:interpro GO_REF:0000002	IEA: Inferred from Electronic Annotation	InterPro:IPR003680	F	Seeded from EcoCyc (v14.0)	complete
	GO:0016491	oxidoreductase activity	GOA:interpro GO_REF:0000002	IEA: Inferred from Electronic Annotation	InterPro:IPR003680	F	Seeded from EcoCyc (v14.0)	complete
	GO:0050662	coenzyme binding	GOA:interpro GO_REF:0000002	IEA: Inferred from Electronic Annotation	InterPro:IPR003680	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 NADPH quinone reductase	could be indirect
Protein	groL		PMID:16606699	Experiment(s):EBI-1144586
Protein	nrfA		PMID:16606699	Experiment(s):EBI-1144586
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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
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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 MSNILIINGA KKFAHSNGQL NDTLTEVADG TLRDLGHDVR IVRADSDYDV KAEVQNFLWA DVVIWQMPGW WMGAPWTVKK YIDDVFTEGH GTLYASDGRT RKDPSKKYGS GGLVQGKKYM LSLTWNAPME AFTEKDQFFH GVGVDGVYLP FHKANQFLGM EPLPTFIAND VIKMPDVPRY TEEYRKHLVE IFG
Length	193
Mol. Wt	21.89 kDa
pI	6.2 (calculated)
Extinction coefficient	44,920 (calc based on 8 Y, 6 W, and 0 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	Notes	References
Domain	2..190	PF02525 Flavodoxin-like fold		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=mdaB taxon=562,83333 </beststructure>

Models

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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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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:16130924	Escherichia coli str. K-12 substr. MG1655
NCBI (Protein) (EcoliWiki Page)	GeneID:947512	Escherichia coli str. K-12 substr. MG1655
ASAP	ASAP:ABE-0009946	Escherichia coli str. K-12 substr. MG1655
UniProt (EcoliWiki Page)	UniProtKB/Swiss-Prot:P0AEY5	Escherichia coli str. K-12 substr. MG1655
EcoCyc	EcoCyc:EG12656	Escherichia coli str. K-12 substr. MG1655
EcoGene	EcoGene:EG12656	Escherichia coli str. K-12 substr. MG1655
NCBI (Gene) (EcoliWiki Page)	GeneID:947512	Escherichia coli str. K-12 substr. MG1655
RegulonDB	RegulonDB:ECK120002346	Escherichia coli str. K-12 substr. MG1655
EchoBASE	EchoBASE:EB2524	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	Reference(s)
Protein	E. coli K-12 MC4100	2.12E+02	molecules/cell	Medium: median data from rich and minimal media Temperature (°C): 37 Doubling time (min): Growth Rate(min): Growth phase: other:	emPAI	PMID:18304323
Protein	E. coli K-12 MG1655	2863	molecules/cell/generation	Medium: MOPS Complete Temperature (°C): 37 Doubling time (min): *Growth phase: OD: other:	Ribosome Profiling	PMID: 24766808
Protein	E. coli K-12 MG1655	850	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	1572	molecules/cell/generation	Medium: MOPS Complete without Methionine Temperature (°C): 37 Doubling time (min): *Growth phase: OD: other:	Ribosome Profiling	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)
mdaB
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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_000913:3170532..3170572 source=MG1655 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:b3028 (EcoliWiki Page)	NCBI GEO profiles for mdaB
microarray	GenExpDB:b3028 (EcoliWiki Page)	Summary of data for mdaB 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 mdaB Expression

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

Database	Accession	Notes
EcoCyc	EcoCyc:EG12656	Escherichia coli str. K-12 substr. MG1655
EchoBASE	EchoBASE:EB2524	Escherichia coli str. K-12 substr. MG1655
EcoliGenExpDB (EcoliWiki Page)	EcoliGenExpDB:b3028
EcoGene	EcoGene:EG12656	Escherichia coli str. K-12 substr. MG1655
RegulonDB	RegulonDB:ECK120002346	Escherichia coli str. K-12 substr. MG1655
ASAP	ASAP:ABE-0009946	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
Schizosaccharomyces pombe	SPAC5H105c (score: 1.000; bootstrap: 100%)	From Inparanoid:20070104
Shigella flexneri	MDAB	From SHIGELLACYC
E. coli O157	MDAB	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)	PF02525 Flavodoxin-like fold
Superfamily (EcoliWiki Page)	SUPERFAMILY:52218
Panther (EcoliWiki Page)	PTHR10204:SF3
EcoCyc	EcoCyc:EG12656	Escherichia coli str. K-12 substr. MG1655
EcoGene	EcoGene:EG12656	Escherichia coli str. K-12 substr. MG1655
RegulonDB	RegulonDB:ECK120002346	Escherichia coli str. K-12 substr. MG1655
EchoBASE	EchoBASE:EB2524	Escherichia coli str. K-12 substr. MG1655
ASAP	ASAP:ABE-0009946	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 ^1.9 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 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 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 ^5.2 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).

mdaB: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 mdaB Expression

Notes

Links

Evolution

Homologs in Other Organisms

Do-It-Yourself Web Tools

Notes

Families

Notes

Links

References

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