Journal Article


John B C Findlay
Richard O'Kennedy
Kate McQuaid
Hui Ma
Darren S Martin
Conor J Breen



green fluorescent protein protein binding crystal structures human health membrane proteins surface plasmon resonance human large scale

Production of Functional Human Vitamin A Transporter/RBP Receptor (STRA6) for Structure Determination. (2014)

Abstract STRA6 is a plasma membrane protein that mediates the transport of vitamin A, or retinol, from plasma retinol binding protein (RBP) into the cell. Mutations in human STRA6 are associated with Matthew-Wood syndrome, which is characterized by severe developmental defects. Despite the obvious importance of this protein to human health, little is known about its structure and mechanism of action. To overcome the difficulties frequently encountered with the production of membrane proteins for structural determination, STRA6 has been expressed in Pichia pastoris as a fusion to green fluorescent protein (GFP), a strategy which has been a critical first step in solving the crystal structures of several membrane proteins. STRA6-GFP was correctly targeted to the cell surface where it bound RBP. Here we report the large-scale expression, purification and characterisation of STRA6-GFP. One litre of culture, corresponding to 175 g cells, yielded about 1.5 mg of pure protein. The interaction between purified STRA6 and its ligand RBP was studied by surface plasmon resonance-based binding analysis. The interaction between STRA6 and RBP was not retinol-dependent and the binding data were consistent with a transient interaction of 1 mole RBP/mole STRA6.
Collections Ireland -> Dublin City University -> PubMed

Full list of authors on original publication

John B C Findlay, Richard O'Kennedy, Kate McQuaid, Hui Ma, Darren S Martin, Conor J Breen

Experts in our system

John B. C. Findlay
Maynooth University
Total Publications: 13
R O'Kennedy
Dublin City University
Total Publications: 197
Kate McQuaid
Maynooth University
Total Publications: 3
Hui Ma
Dublin City University
Total Publications: 8
Darren S. Martin
Maynooth University
Total Publications: 6