The solution structure of the DPY module from the Dumpy protein

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 22 

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Drosophila Dumpy is a Gigantic Extracellular Protein Required to Maintain Tension at Epidermal-Cuticle Attachment Sites

Wilkin, M.B.Becker, M.N.Mulvey, D.Phan, I.Chao, A.Cooper, K.Chung, H.J.Campbell, I.D.Baron, M.MacIntyre, R.

(2000) Curr Biol 10: 559-567

  • DOI: https://doi.org/10.1016/s0960-9822(00)00482-6
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Growth and morphogenesis during development depend both on patterning genes, which assign positional information, and on genes that regulate mechanical forces. The dumpy gene of the fruit fly Drosophila melanogaster is an example of the latter class, with mutant phenotypes affecting size and shape of the limbs, thoracic cuticle, trachea and mouthparts. The genetically complex dumpy locus was found to span over 100 kb and encode a gigantic 2.5 MDa extracellular matrix protein. Dumpy represents an extreme form of modular protein evolution, containing 308 epidermal growth factor (EGF) modules, interspersed with a new module class, DPY, and terminating in a crosslinking zona pellucida domain and membrane anchor sequence. We determined the three-dimensional structure of the DPY module by nuclear magnetic resonance (NMR) spectroscopy and found that it forms a disulphide-stabilised beta sheet motif, capable of linking end-to-end with EGF modules to form a fibre. Consistent with its cuticle phenotypes, dumpy is expressed at several sites of cuticle-epidermal cell attachment, including the trachea and the muscle tendon cells, which mediate anchorage of the muscles to the cuticle. The dumpy gene encodes a gigantic extracellular molecule that we predict to be a membrane-anchored fibre of almost a micrometer in length. Insertion and crosslinking of this fibre within the cuticle may provide a strong anchor for the underlying tissue, allowing it to maintain mechanical tension at sites under stress. This would explain its contribution to tissue morphogenesis through its regulation of mechanical properties.

  • Organizational Affiliation

    Stopford Building, University of Manchester, School of Biological Sciences, Manchester, M13 9PT, UK.


Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Dumpy, isoform Y24Drosophila melanogasterMutation(s): 0 
Find proteins for M9PB30 (Drosophila melanogaster)
Explore M9PB30 
Go to UniProtKB:  M9PB30
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UniProt GroupM9PB30
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 22 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-06-26
    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: 2018-06-20
    Changes: Data collection, Database references, Source and taxonomy, Structure summary