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On One Page

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Gene |

Product(s) |

Expression|

Evolution |

References |

Quickview

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Standard Name	btuB
Gene Synonym(s)	ECK3958, b3966, JW3938, bfe, cer, G276^[1]^[2], dcrC
Product Desc.	outer membrane receptor for transport of vitamin B12, E colicins, and bacteriophage BF23^[2]^[3] B12 uptake, outer membrane receptor; receptor for E colicins, phages BF23 and C1^[4]
Product Synonyms(s)	vitamin B12/cobalamin outer membrane transporter^[1], B3966^[2]^[1], Cer^[2]^[1], Bfe^[2]^[1], BtuB^[2]^[1] , bfe, cer, dcrC, ECK3958, JW3938, b3966
Function from GO	<GO_nr />
Knock-Out Phenotype
Regulation/Expression	transcription unit(s): btuB^[2]
Regulation/Activity
Quick Links
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Notes

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BtuB translation is regulated by adenosylcobalamin binding directly to btuB mRNA, a B12-responsive riboswitch.^[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	btuB
Mnemonic	B12 uptake
Synonyms	ECK3958, b3966, JW3938, bfe, cer, G276^[1]^[2], dcrC
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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	89.7 minutes	MG1655: 4161662..4163506 <gbrowseImage> name=NC_000913:4161662..4163506 source=MG1655 preset=GeneLocation </gbrowseImage>	EcoCyc GBrowse(MG1655)	FASTA Dump EcoCyc Sequence Dump
REL606		NC_012967: 4143500..4145344 <gbrowseImage> name=NC_012967:4143500..4145344 source=REL606 preset=GeneLocation </gbrowseImage>	GBrowse (REL606)	FASTA Dump
BW2952		NC_012759: 4051331..4053175 <gbrowseImage> name=NC_012759:4051331..4053175 source=BW2952 preset=GeneLocation </gbrowseImage>	GBrowse (BW2952)	FASTA Dump
W3110		W3110: 3473042..3471198 <gbrowseImage> name=NC_007779:3471198..3473042 source=W3110 preset=GeneLocation </gbrowseImage>	GBrowse(W3110)	FASTA Dump
DH10B		DH10B: 4261359..4263203 <gbrowseImage> name=NC_010473:4261359..4263203 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	4161722	Edman degradation	PMID:9298646
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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
btuB451	C to T	L28P		Inactivates uptake of cyanocobalamin	PMID:336607 PMID:3882670		seeded from UniProt:P06129
btuBV30G,P		V30G,P		Inactivates uptake			seeded from UniProt:P06129
btuB(del) (Keio:JW3938)	deletion	deletion			PMID:16738554	Shigen CGSC10842^[5]
btuB460::Tn10						CGSC:9720
btuB51						CGSC:9749
btuB501						CGSC:26651
btuB69						CGSC:26743
btuB451	C to T	L28P		Prevents uptake of cyanocobalamin	PMID:336607 PMID:3882670	CGSC:26747
btuB3192::Tn10kan						CGSC:46766
btuB3191::Tn10						CGSC:46769
btuB754(del)::kan					PMID:16738554	CGSC:100212
BtuB(del)	Deletion	Deletion	Auxotrophies	deletion causes uptake of Cbl to stop	PMID:6768753
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Notes

The Keio collection^[6] lists a deletion of btuB. The insertion in this strain is a duplication of the btuB region.^[7]

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
JW3938	Plasmid clone	Shigen	PMID:16769691 Status:Clone OK Primer 1:GCCATTAAAAAAGCTTCGCTGCT Primer 2:CCGAAGGTGTAGCTGCCAGACAA
E11C11	Kohara Phage	Genobase	PMID:3038334
4G11	Kohara Phage	Genobase	PMID:3038334
argE86::Tn10	Linked marker	CAG12185 = CGSC7471^[5]	est. P1 cotransduction: 73% ^[8]
thiC39::Tn10	Linked marker	CAG18500 = CGSC7472^[5]	est. P1 cotransduction: 27% ^[8] Synonyms:thi-39::Tn10
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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:EG10126	Escherichia coli str. K-12 substr. MG1655
EcoGene	EcoGene:EG10126	Escherichia coli str. K-12 substr. MG1655
RegulonDB	RegulonDB:ECK120000122	Escherichia coli str. K-12 substr. MG1655
NCBI (EcoliWiki Page)	GeneID:948468	Escherichia coli str. K-12 substr. MG1655
EchoBASE	EchoBASE:EB0124	Escherichia coli str. K-12 substr. MG1655
ASAP	ASAP:ABE-0012987	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	BtuB
Synonyms	vitamin B12/cobalamin outer membrane transporter^[1], B3966^[2]^[1], Cer^[2]^[1], Bfe^[2]^[1], BtuB^[2]^[1] , bfe, cer, dcrC, ECK3958, JW3938, b3966
Product description	outer membrane receptor for transport of vitamin B12, E colicins, and bacteriophage BF23^[2]^[3] B12 uptake, outer membrane receptor; receptor for E colicins, phages BF23 and C1^[4]
EC number (for enzymes)
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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:0004872	receptor activity	GOA:interpro GO_REF:0000002	IEA: Inferred from Electronic Annotation	InterPro:IPR000531	F	Seeded from EcoCyc (v14.0)	complete
	GO:0004872	receptor activity	GOA:interpro GO_REF:0000002	IEA: Inferred from Electronic Annotation	InterPro:IPR010101	F	Seeded from EcoCyc (v14.0)	complete
	GO:0004872	receptor activity	GOA:interpro GO_REF:0000002	IEA: Inferred from Electronic Annotation	InterPro:IPR012910	F	Seeded from EcoCyc (v14.0)	complete
	GO:0004872	receptor activity	GOA:spkw SP_KW:GO_REF:0000004	IEA: Inferred from Electronic Annotation	SP_KW:KW-0675	F	Seeded from EcoCyc (v14.0)	complete
	GO:0005215	transporter activity	GOA:interpro GO_REF:0000002	IEA: Inferred from Electronic Annotation	InterPro:IPR000531	F	Seeded from EcoCyc (v14.0)	complete
	GO:0005215	transporter activity	GOA:interpro GO_REF:0000002	IEA: Inferred from Electronic Annotation	InterPro:IPR012910	F	Seeded from EcoCyc (v14.0)	complete
	GO:0005509	calcium ion binding	GOA:spkw SP_KW:GO_REF:0000004	IEA: Inferred from Electronic Annotation	SP_KW:KW-0106	F	Seeded from EcoCyc (v14.0)	complete
	GO:0005886	plasma membrane	GOA:spkw SP_KW:GO_REF:0000004	IEA: Inferred from Electronic Annotation	SP_KW:KW-1003	C	Seeded from EcoCyc (v14.0)	complete
	GO:0006810	transport	GOA:interpro GO_REF:0000002	IEA: Inferred from Electronic Annotation	InterPro:IPR000531	P	Seeded from EcoCyc (v14.0)	complete
	GO:0006810	transport	GOA:interpro GO_REF:0000002	IEA: Inferred from Electronic Annotation	InterPro:IPR012910	P	Seeded from EcoCyc (v14.0)	complete
	GO:0006810	transport	GOA:spkw SP_KW:GO_REF:0000004	IEA: Inferred from Electronic Annotation	SP_KW:KW-0813	P	Seeded from EcoCyc (v14.0)	complete
	GO:0006811	ion transport	GOA:spkw SP_KW:GO_REF:0000004	IEA: Inferred from Electronic Annotation	SP_KW:KW-0406	P	Seeded from EcoCyc (v14.0)	complete
	GO:0009279	cell outer membrane	GOA:hamap GO_REF:0000020	IEA: Inferred from Electronic Annotation	HAMAP:MF_01531	C	Seeded from EcoCyc (v14.0)	complete
	GO:0009279	cell outer membrane	GOA:spkw SP_KW:GO_REF:0000004	IEA: Inferred from Electronic Annotation	SP_KW:KW-0998	C	Seeded from EcoCyc (v14.0)	complete
	GO:0015889	cobalamin transport	PMID:11790740	IMP: Inferred from Mutant Phenotype		P		complete
	GO:0009597	detection of virus	GOA:spkw SP_KW:GO_REF:0000004	IEA: Inferred from Electronic Annotation	SP_KW:KW-0580	P	Seeded from EcoCyc (v14.0)	complete
	GO:0015235	cobalamin transporter activity	GOA:hamap GO_REF:0000020	IEA: Inferred from Electronic Annotation	HAMAP:MF_01531	F	Seeded from EcoCyc (v14.0)	complete
	GO:0015889	cobalamin transport	GOA:hamap GO_REF:0000020	IEA: Inferred from Electronic Annotation	HAMAP:MF_01531	P	Seeded from EcoCyc (v14.0)	complete
	GO:0015889	cobalamin transport	GOA:interpro GO_REF:0000002	IEA: Inferred from Electronic Annotation	InterPro:IPR010101	P	Seeded from EcoCyc (v14.0)	complete
	GO:0016020	membrane	GOA:interpro GO_REF:0000002	IEA: Inferred from Electronic Annotation	InterPro:IPR000531	C	Seeded from EcoCyc (v14.0)	complete
	GO:0016020	membrane	GOA:interpro GO_REF:0000002	IEA: Inferred from Electronic Annotation	InterPro:IPR010101	C	Seeded from EcoCyc (v14.0)	complete
	GO:0016020	membrane	GOA:interpro GO_REF:0000002	IEA: Inferred from Electronic Annotation	InterPro:IPR012910	C	Seeded from EcoCyc (v14.0)	complete
	GO:0016020	membrane	GOA:spkw SP_KW:GO_REF:0000004	IEA: Inferred from Electronic Annotation	SP_KW:KW-0472	C	Seeded from EcoCyc (v14.0)	complete
	GO:0016021	integral to membrane	GOA:spkw SP_KW:GO_REF:0000004	IEA: Inferred from Electronic Annotation	SP_KW:KW-0812	C	Seeded from EcoCyc (v14.0)	complete
	GO:0016021	integral to membrane	GO_REF:0000023	IEA: Inferred from Electronic Annotation	SP_SL:SL-9909	C	Seeded from EcoCyc (v14.0)	complete
	GO:0046718	entry of virus into host cell	GOA:spkw SP_KW:GO_REF:0000004	IEA: Inferred from Electronic Annotation	SP_KW:KW-0580	P	Seeded from EcoCyc (v14.0)	complete
	GO:0046872	metal ion binding	GOA:spkw SP_KW:GO_REF:0000004	IEA: Inferred from Electronic Annotation	SP_KW:KW-0479	F	Seeded from EcoCyc (v14.0)	complete
	GO:0046930	pore complex	GOA:spkw SP_KW:GO_REF:0000004	IEA: Inferred from Electronic Annotation	SP_KW:KW-0626	C	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
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</protect>

Notes

Localization

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

Compartment	Evidence	Reference/Source
Outer Membrane	PMID:9298646	EchoLocation:btuB
outer membrane		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 MIKKASLLTA CSVTAFSAWA QDTSPDTLVV TANRFEQPRS TVLAPTTVVT RQDIDRWQST SVNDVLRRLP GVDITQNGGS GQLSSIFIRG TNASHVLVLI DGVRLNLAGV SGSADLSQFP IALVQRVEYI RGPRSAVYGS DAIGGVVNII TTRDEPGTEI SAGWGSNSYQ NYDVSTQQQL GDKTRVTLLG DYAHTHGYDV VAYGNTGTQA QTDNDGFLSK TLYGALEHNF TDAWSGFVRG YGYDNRTNYD AYYSPGSPLL DTRKLYSQSW DAGLRYNGEL IKSQLITSYS HSKDYNYDPH YGRYDSSATL DEMKQYTVQW ANNVIVGHGS IGAGVDWQKQ TTTPGTGYVE DGYDQRNTGI YLTGLQQVGD FTFEGAARSD DNSQFGRHGT WQTSAGWEFI EGYRFIASYG TSYKAPNLGQ LYGFYGNPNL DPEKSKQWEG AFEGLTAGVN WRISGYRNDV SDLIDYDDHT LKYYNEGKAR IKGVEATANF DTGPLTHTVS YDYVDARNAI TDTPLLRRAK QQVKYQLDWQ LYDFDWGITY QYLGTRYDKD YSSYPYQTVK MGGVSLWDLA VAYPVTSHLT VRGKIANLFD KDYETVYGYQ TAGREYTLSG SYTF
Length	614
Mol. Wt	68.407 kDa
pI	5.2 (calculated)
Extinction coefficient	150,010 - 150,135 (calc based on 49 Y, 14 W, and 1 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
motif	1-20	UniProt Manual:Signal Peptides	UniProt:P06129
Domain	390..613	PF00593 TonB dependent receptor		PMID:19920124
Domain	38..146	PF07715 TonB-dependent Receptor Plug Domain		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=btuB taxon=562,83333 </beststructure>

Models

View models at:

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</protect>

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:16131804	Escherichia coli str. K-12 substr. MG1655
NCBI (Protein) (EcoliWiki Page)	GeneID:948468	Escherichia coli str. K-12 substr. MG1655
ASAP	ASAP:ABE-0012987	Escherichia coli str. K-12 substr. MG1655
UniProt (EcoliWiki Page)	UniProtKB/Swiss-Prot:P06129	Escherichia coli str. K-12 substr. MG1655
EcoCyc	EcoCyc:EG10126	Escherichia coli str. K-12 substr. MG1655
EcoGene	EcoGene:EG10126	Escherichia coli str. K-12 substr. MG1655
NCBI (Gene) (EcoliWiki Page)	GeneID:948468	Escherichia coli str. K-12 substr. MG1655
RegulonDB	RegulonDB:ECK120000122	Escherichia coli str. K-12 substr. MG1655
EchoBASE	EchoBASE:EB0124	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	2.38E+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	2295	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	564	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	1115	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)
btuB
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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_000913:4161642..4161682 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:b3966 (EcoliWiki Page)	NCBI GEO profiles for btuB
microarray	GenExpDB:b3966 (EcoliWiki Page)	Summary of data for btuB 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
	GFP Fusion	Intergenic region (4160756..4161268) fused to gfpmut2.	OpenBioSystems	GFP fusion described in Zaslaver, et al. Plate:109-AZ10; Well:A6^[9]
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Notes

Accessions Related to btuB Expression

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

Database	Accession	Notes
EcoCyc	EcoCyc:EG10126	Escherichia coli str. K-12 substr. MG1655
EchoBASE	EchoBASE:EB0124	Escherichia coli str. K-12 substr. MG1655
EcoliGenExpDB (EcoliWiki Page)	EcoliGenExpDB:b3966
EcoGene	EcoGene:EG10126	Escherichia coli str. K-12 substr. MG1655
RegulonDB	RegulonDB:ECK120000122	Escherichia coli str. K-12 substr. MG1655
ASAP	ASAP:ABE-0012987	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
Xenopus tropicalis	ENSXETP00000051690 (score: 1.000; bootstrap: 97%)	From Inparanoid:20070104
Shigella flexneri	BTUB	From SHIGELLACYC
E. coli O157	BTUB	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
Superfamily (EcoliWiki Page)	SUPERFAMILY:56935
Pfam (EcoliWiki Page)	PF00593 TonB dependent receptor
Pfam (EcoliWiki Page)	PF07715 TonB-dependent Receptor Plug Domain
EcoCyc	EcoCyc:EG10126	Escherichia coli str. K-12 substr. MG1655
EcoGene	EcoGene:EG10126	Escherichia coli str. K-12 substr. MG1655
RegulonDB	RegulonDB:ECK120000122	Escherichia coli str. K-12 substr. MG1655
EchoBASE	EchoBASE:EB0124	Escherichia coli str. K-12 substr. MG1655
ASAP	ASAP:ABE-0012987	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.

↑ ^1.00 ^1.01 ^1.02 ^1.03 ^1.04 ^1.05 ^1.06 ^1.07 ^1.08 ^1.09 ^1.10 ^1.11 Riley, M. et al. (2006) Nucleic Acids Res 34:1-6 (corrected supplemental data from B. Wanner)
↑ ^2.00 ^2.01 ^2.02 ^2.03 ^2.04 ^2.05 ^2.06 ^2.07 ^2.08 ^2.09 ^2.10 ^2.11 ^2.12 EcoCyc (release 10.6; 2007) Keseler, IM et al. (2005) Nucleic Acids Res. 33(Database issue):D334-7
↑ ^3.0 ^3.1 ^3.2 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
↑ Baba, T et al. (2006) Construction of Escherichia coli K-12 in-frame, single-gene knockout mutants: the Keio collection. Mol. Syst. Biol. 2 2006.0008 PubMed
↑ Yamamoto, N et al. (2009) Update on the Keio collection of Escherichia coli single-gene deletion mutants. Mol. Syst. Biol. 5 335 PubMed
↑ ^8.0 ^8.1 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).
↑ Zaslaver, A et al. (2006) A comprehensive library of fluorescent transcriptional reporters for Escherichia coli. Nat. Methods 3 623-8 PubMed

btuB: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 btuB Expression

Notes

Links

Evolution

Homologs in Other Organisms

Do-It-Yourself Web Tools

Notes

Families

Notes

Links

References

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