1W8A | pdb_00001w8a

Third LRR domain of Drosophila Slit

• PDB DOI: https://doi.org/10.2210/pdb1W8A/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Drosophila melanogaster
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2004-09-17 Released: 2004-10-25 
• Deposition Author(s): Howitt, J.A., Clout, N.J., Hohenester, E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 
  0.269 (Depositor), 0.267 (DCC) 
• R-Value Work: 
  0.199 (Depositor), 0.199 (DCC) 
• R-Value Observed: 
  0.199 (Depositor) 

Starting Model: experimental

Literature

Binding Site for Robo Receptors Revealed by Dissection of the Leucine-Rich Repeat Region of Slit.

Howitt, J.A., Clout, N.J., Hohenester, E.

(2004) EMBO J 23: 4406

• PubMed: 15496984 
• DOI: https://doi.org/10.1038/sj.emboj.7600446
• Primary Citation Related Structures: 
  1W8A


• PubMed Abstract: 
  

  Recognition of the large secreted protein Slit by receptors of the Robo family provides fundamental signals in axon guidance and other developmental processes. In Drosophila, Slit-Robo signalling regulates midline crossing and the lateral position of longitudinal axon tracts. We report the functional dissection of Drosophila Slit, using structure analysis, site-directed mutagenesis and in vitro assays. The N-terminal region of Slit consists of a tandem array of four independently folded leucine-rich repeat (LRR) domains, connected by disulphide-tethered linkers. All three Drosophila Robos were found to compete for a single highly conserved site on the concave face of the second LRR domain of Slit. We also found that this domain is sufficient for biological activity in a chemotaxis assay. Other Slit activities may require Slit dimerisation mediated by the fourth LRR domain. Our results show that a small portion of Slit is able to induce Robo signalling and indicate that the distinct functions of Drosophila Robos are encoded in their divergent cytosolic domains.

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Organizational Affiliation: 
• Department of Biological Sciences, Imperial College London, London, UK. [e-mail]

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content 

• Total Structure Weight: 21.31 kDa 
• Atom Count: 1,470 
• Modeled Residue Count: 189 
• Deposited Residue Count: 192 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
SLIT PROTEIN	A	192	Drosophila melanogaster	Mutation(s): 0
UniProt
Find proteins for P24014 (Drosophila melanogaster) Explore P24014  Go to UniProtKB:  P24014

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free:  0.269 (Depositor), 0.267 (DCC) 
• R-Value Work:  0.199 (Depositor), 0.199 (DCC) 
• R-Value Observed: 0.199 (Depositor) 

Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 121.213	α = 90
b = 31.852	β = 100.72
c = 49.526	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
MOSFLM	data reduction
SCALA	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-10-25 
Deposition Author(s): Howitt, J.A., Clout, N.J., Hohenester, E.

Revision History  

• Version 1.0: 2004-10-25
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-11-08
  Changes: Advisory, Source and taxonomy
• Version 1.4: 2023-12-13
  Changes: Advisory, Data collection, Database references, Other, Refinement description
• Version 1.5: 2024-11-20
  Changes: Structure summary