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3M8B

Crystal structure of spin-labeled BtuB V10R1 in the apo state

Functional Information from GO Data
ChainGOidnamespacecontents
A0005509molecular_functioncalcium ion binding
A0005515molecular_functionprotein binding
A0006811biological_processmonoatomic ion transport
A0009279cellular_componentcell outer membrane
A0015288molecular_functionporin activity
A0015420molecular_functionABC-type vitamin B12 transporter activity
A0015889biological_processcobalamin transport
A0016020cellular_componentmembrane
A0019904molecular_functionprotein domain specific binding
A0034220biological_processmonoatomic ion transmembrane transport
A0035461biological_processvitamin transmembrane transport
A0046872molecular_functionmetal ion binding
A0046930cellular_componentpore complex
A0090482molecular_functionvitamin transmembrane transporter activity
A1902495cellular_componenttransmembrane transporter complex
Functional Information from PDB Data
site_idAC1
Number of Residues12
Details
ChainResidue
AALA357
AHOH772
AC8E603
AC8E607
AARG358
AARG367
AGLY369
ATHR370
AVAL429
APHE470
ATHR472
AGLY473

site_idAC2
Number of Residues5
Details
ChainResidue
ATHR338
AASP361
ASER363
ATYR383
APHE422

site_idAC3
Number of Residues12
Details
ChainResidue
AILE261
ATRP300
AASN302
AVAL304
AALA313
AGLY314
ALEU342
AILE433
AALA466
ATHR467
AC8E601
AC8E605

site_idAC4
Number of Residues7
Details
ChainResidue
AILE311
APHE353
AGLY355
AALA356
ATHR373
AVAL503
AC8E606

site_idAC5
Number of Residues7
Details
ChainResidue
ATYR256
AASN302
AGLY435
ATYR436
AGLY463
AHOH747
AC8E603

site_idAC6
Number of Residues4
Details
ChainResidue
AGLN346
ATYR505
ATYR520
AC8E604

site_idAC7
Number of Residues3
Details
ChainResidue
ATRP371
ATHR472
AC8E601

site_idAC8
Number of Residues3
Details
ChainResidue
AHIS174
AHIS176
AHIS449

site_idAC9
Number of Residues1
Details
ChainResidue
AHIS558

site_idBC1
Number of Residues1
Details
ChainResidue
AASP411

site_idBC2
Number of Residues2
Details
ChainResidue
AHIS174
AHIS176

Functional Information from PROSITE/UniProt
site_idPS01156
Number of Residues18
DetailsTONB_DEPENDENT_REC_2 TonB-dependent receptor (TBDR) proteins signature 2. YgyqTaGReYtLSGsYtF
ChainResidueDetails
ATYR577-PHE594

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues278
DetailsTransmembrane: {"description":"Beta stranded"}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues62
DetailsTopological domain: {"description":"Extracellular","evidences":[{"source":"PubMed","id":"12652322","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues32
DetailsTopological domain: {"description":"Periplasmic","evidences":[{"source":"PubMed","id":"12652322","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues114
DetailsDomain: {"description":"TBDR plug","evidences":[{"source":"PROSITE-ProRule","id":"PRU01360","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI5
Number of Residues7
DetailsMotif: {"description":"TonB box"}
ChainResidueDetails

site_idSWS_FT_FI6
Number of Residues17
DetailsMotif: {"description":"TonB C-terminal box"}
ChainResidueDetails

site_idSWS_FT_FI7
Number of Residues7
DetailsBinding site: {"evidences":[{"source":"PubMed","id":"12652322","evidenceCode":"ECO:0000269"},{"source":"PDB","id":"1NQH","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails

site_idSWS_FT_FI8
Number of Residues1
DetailsBinding site: {"evidences":[{"source":"PubMed","id":"12652322","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

239803

PDB entries from 2025-08-06

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