5AOQ

Structural basis of neurohormone perception by the receptor tyrosine kinase Torso


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.362 
  • R-Value Work: 0.342 
  • R-Value Observed: 0.343 

wwPDB Validation 3D Report Full Report



Literature

Structural Basis of Neurohormone Perception by the Receptor Tyrosine Kinase Torso.

Jenni, S.Goyal, Y.von Grotthuss, M.Shvartsman, S.Y.Klein, D.E.

(2015) Mol Cell 60: 941

  • DOI: 10.1016/j.molcel.2015.10.026
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • In insects, brain-derived Prothoracicotropic hormone (PTTH) activates the receptor tyrosine kinase (RTK) Torso to initiate metamorphosis through the release of ecdysone. We have determined the crystal structure of silkworm PTTH in complex with the li ...

    In insects, brain-derived Prothoracicotropic hormone (PTTH) activates the receptor tyrosine kinase (RTK) Torso to initiate metamorphosis through the release of ecdysone. We have determined the crystal structure of silkworm PTTH in complex with the ligand-binding region of Torso. Here we show that ligand-induced Torso dimerization results from the sequential and negatively cooperative formation of asymmetric heterotetramers. Mathematical modeling of receptor activation based upon our biophysical studies shows that ligand pulses are "buffered" at low receptor levels, leading to a sustained signal. By contrast, high levels of Torso develop the signal intensity and duration of a noncooperative system. We propose that this may allow Torso to coordinate widely different functions from a single ligand by tuning receptor levels. Phylogenic analysis indicates that Torso is found outside arthropods, including human parasitic roundworms. Together, our findings provide mechanistic insight into how this receptor system, with roles in embryonic and adult development, is regulated.


    Organizational Affiliation

    Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA; Division of Molecular Medicine, Children's Hospital, Boston, MA 02115, USA. Electronic address: klein@crystal.harvard.edu.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TORSO
A, B
272Bombyx moriMutation(s): 0 
Gene Names: tor
EC: 2.7.10.1
Find proteins for D2IYS2 (Bombyx mori)
Go to UniProtKB:  D2IYS2
Protein Feature View
  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PREPROPTTH
L, M
109Bombyx moriMutation(s): 1 
Find proteins for P17219 (Bombyx mori)
Go to UniProtKB:  P17219
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download CCD File 
A, B
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.362 
  • R-Value Work: 0.342 
  • R-Value Observed: 0.343 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.42α = 90
b = 90.96β = 90
c = 244.28γ = 90
Software Package:
Software NamePurpose
PHASERmodel building
XDSdata reduction
XSCALEdata scaling
SHELXDphasing
SHARPphasing
RESOLVEphasing
PHASERphasing
PHENIXphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-11-25
    Type: Initial release
  • Version 1.1: 2016-01-13
    Changes: Database references
  • Version 2.0: 2017-12-13
    Changes: Atomic model, Database references