Solution Structure of the Transforming Growth Factor Beta-binding Protein-like Module, a Domain Associated with Matrix Fibrils
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Molecular Biology
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Here we describe the high resolution nuclear magnetic resonance (NMR) structure of a transforming growth factor beta (TGF-beta)-binding protein-like (TB) domain, which comes from human fibrillin-1, the protein defective in the Marfan syndrome (MFS). This domain is found in fibrillins and latent TGF-beta-binding proteins (LTBPs) which are localized to fibrillar structures in the extracellular matrix. The TB domain manifests a novel fold which is globular and comprises six antiparallel beta-strands and two alpha-helices. An unusual cysteine triplet conserved in the sequences of TB domains is localized to the hydrophobic core, at the C-terminus of an alpha-helix. The structure is stabilized by four disulfide bonds which pair in a 1-3, 2-6, 4-7, 5-8 pattern, two of which are solvent exposed. Analyses of MFS-causing mutations and the fibrillin-1 cell-binding RGD site provide the first clues to the surface specificity of TB domain interactions. Modelling of a homologous TB domain from LTBP-1 (residues 1018-1080) suggests that hydrophobic contacts may play a role in its interaction with the TGF-beta1 latency-associated peptide.
Hassani M, Taghizadeh S, Farahzad Broujeni A, Habibi M, Banitalebi S, Kasiri M Adv Biomed Res. 2023; 12:114.
PMID: 37288014 PMC: 10241635. DOI: 10.4103/abr.abr_138_22.
Cardiac Complications in Marfan Syndrome: A Review.
Singh J, Wanjari A Cureus. 2022; 14(9):e29800.
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Peeters S, De Kinderen P, Meester J, Verstraeten A, Loeys B Hum Mutat. 2022; 43(7):815-831.
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Pathophysiology and Pathogenesis of Marfan Syndrome.
Zeigler S, Sloan B, Jones J Adv Exp Med Biol. 2021; 1348:185-206.
PMID: 34807420 PMC: 8915437. DOI: 10.1007/978-3-030-80614-9_8.
Wheeler J, Ikonomidis J, Jones J Adv Exp Med Biol. 2021; 1348:161-184.
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