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


This is version 3.0 of the entry. See complete history


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
  • Primary Citation of Related Structures:  
    5AOQ

  • 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 ligand-binding region of Torso ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TORSOA, B272Bombyx moriMutation(s): 0 
Gene Names: tor
EC: 2.7.10.1
UniProt
Find proteins for D2IYS2 (Bombyx mori)
Explore D2IYS2 
Go to UniProtKB:  D2IYS2
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PREPROPTTHC [auth L], D [auth M]109Bombyx moriMutation(s): 1 
UniProt
Find proteins for P17219 (Bombyx mori)
Explore P17219 
Go to UniProtKB:  P17219
Protein Feature View
Expand
  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseE [auth C], F [auth D]2N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
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  (Full details and data files)

  • 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
  • Version 3.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Other, Structure summary