	234,785 Structures from the PDB
	1,068,577 Computed Structure Models (CSM)

1B6C|pdb_00001b6c

CRYSTAL STRUCTURE OF THE CYTOPLASMIC DOMAIN OF THE TYPE I TGF-BETA RECEPTOR IN COMPLEX WITH FKBP12

PDB DOI: https://doi.org/10.2210/pdb1B6C/pdb

Classification: COMPLEX (ISOMERASE/PROTEIN KINASE)
Organism(s): Homo sapiens
Expression System: Spodoptera frugiperda,Escherichia coli
Mutation(s): No

Deposited: 1999-01-13 Released: 1999-06-15
Deposition Author(s): Huse, M.,Chen, Y.-G.,Massague, J.,Kuriyan, J.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.60 Å
R-Value Free:
0.269 (Depositor), 0.270 (DCC)
R-Value Work:
0.249 (Depositor), 0.250 (DCC)
R-Value Observed:
0.249 (Depositor)

wwPDB Validation 3D Report Full Report

This is version 1.3 of the entry. See complete history.

Literature

Crystal structure of the cytoplasmic domain of the type I TGF beta receptor in complex with FKBP12.

Huse, M., Chen, Y.G., Massague, J., Kuriyan, J.

(1999) Cell 96: 425-436

PubMed: 10025408 Search on PubMed
DOI: https://doi.org/10.1016/s0092-8674(00)80555-3
Primary Citation of Related Structures:
1B6C

PubMed Abstract:
Activation of the type I TGFbeta receptor (TbetaR-I) requires phosphorylation of a regulatory segment known as the GS region, located upstream of the serine/threonine kinase domain in the cytoplasmic portion of the receptor. The crystal structure of a fragment of unphosphorylated TbetaR-I, containing both the GS region and the catalytic domain, has been determined in complex with the FK506-binding protein FKBP12. TbetaR-I adopts an inactive conformation that is maintained by the unphosphorylated GS region. FKBP12 binds to the GS region of the receptor, capping the TbetaR-II phosphorylation sites and further stabilizing the inactive conformation of TbetaR-I. Certain structural features at the catalytic center of TbetaR-I are characteristic of tyrosine kinases rather than Ser/Thr kinases.

Organizational Affiliation

Laboratories of Molecular Biophysics, Rockefeller University, New York, New York 10021, USA.

Macromolecule Content

Total Structure Weight: 203.41 kDa
Atom Count: 13,840
Modelled Residue Count: 1,732
Deposited Residue Count: 1,796
Unique protein chains: 2

Macromolecules

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(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
FK506-BINDING PROTEIN	A,C,E,G	107	Homo sapiens	Mutation(s): 0 EC: 5.2.1.8
UniProt & NIH Common Fund Data Resources
Find proteins for P62942 (Homo sapiens) Explore P62942 Go to UniProtKB: P62942
PHAROS: P62942 GTEx: ENSG00000088832
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P62942
Sequence Annotations Expand
Reference Sequence

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(by identity cutoff) | 3D Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
TGF-B SUPERFAMILY RECEPTOR TYPE I	B,D,F,H	342	Homo sapiens	Mutation(s): 0 EC: 2.7.1.37 (PDB Primary Data), 2.7.11.30 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P36897 (Homo sapiens) Explore P36897 Go to UniProtKB: P36897
PHAROS: P36897 GTEx: ENSG00000106799
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P36897
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
SO4 Query on SO4 Download Ideal Coordinates CCD File SDF format, chain I [auth B] SDF format, chain J [auth D] SDF format, chain K [auth F] SDF format, chain L [auth H] MOL2 format, chain I [auth B] MOL2 format, chain J [auth D] MOL2 format, chain K [auth F] MOL2 format, chain L [auth H] mmCIF format, chain I [auth B] mmCIF format, chain J [auth D] mmCIF format, chain K [auth F] mmCIF format, chain L [auth H]	I [auth B], J [auth D], K [auth F], L [auth H]	SULFATE ION O₄ S QAOWNCQODCNURD-UHFFFAOYSA-L		Interactions Focus chain I [auth B] Focus chain J [auth D] Focus chain K [auth F] Focus chain L [auth H] Interactions & Density Focus chain I [auth B] Focus chain J [auth D] Focus chain K [auth F] Focus chain L [auth H]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.60 Å
R-Value Free: 0.269 (Depositor), 0.270 (DCC)
R-Value Work: 0.249 (Depositor), 0.250 (DCC)
R-Value Observed: 0.249 (Depositor)

Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 75.58	α = 86.23
b = 81.06	β = 81.86
c = 90.53	γ = 63.92

Software Package:

Software Name	Purpose
CCP4	model building
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CCP4	phasing

Structure Validation

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Entry History

Deposition Data

Released Date: 1999-06-15

Deposition Author(s):

Revision History (Full details and data files)

Version 1.0: 1999-06-15
Type: Initial release
Version 1.1: 2008-03-24
Changes: Version format compliance
Version 1.2: 2011-07-13
Changes: Version format compliance
Version 1.3: 2024-02-07
Changes: Data collection, Database references, Derived calculations, Other