| Structural highlights
Disease
[TGFB1_HUMAN] Defects in TGFB1 are the cause of Camurati-Engelmann disease (CE) [MIM:131300]; also known as progressive diaphyseal dysplasia 1 (DPD1). CE is an autosomal dominant disorder characterized by hyperostosis and sclerosis of the diaphyses of long bones. The disease typically presents in early childhood with pain, muscular weakness and waddling gait, and in some cases other features such as exophthalmos, facial paralysis, hearing difficulties and loss of vision.[1] [2] [3] [4] [5]
Function
[TGFB1_HUMAN] Multifunctional protein that controls proliferation, differentiation and other functions in many cell types. Many cells synthesize TGFB1 and have specific receptors for it. It positively and negatively regulates many other growth factors. It plays an important role in bone remodeling as it is a potent stimulator of osteoblastic bone formation, causing chemotaxis, proliferation and differentiation in committed osteoblasts.
Publication Abstract from PubMed
Various important biological pathways are modulated by TGFbeta isoforms; as such they are potential targets for therapeutic intervention. Fresolimumab, also known as GC1008, is a pan-TGFbeta neutralizing antibody that has been tested clinically for several indications including an ongoing trial for focal segmental glomerulosclerosis. The structure of the antigen-binding fragment of fresolimumab (GC1008 Fab) in complex with TGFbeta3 has been reported previously, but the structural capacity of fresolimumab to accommodate tight interactions with TGFbeta1 and TGFbeta2 was insufficiently understood. We report the crystal structure of the single-chain variable fragment of fresolimumab (GC1008 scFv) in complex with target TGFbeta1 to a resolution of 3.00 A and the crystal structure of GC1008 Fab in complex with TGFbeta2 to 2.83 A. The structures provide further insight into the details of TGFbeta recognition by fresolimumab, give a clear indication of the determinants of fresolimumab pan-specificity and provide potential starting points for the development of isoform-specific antibodies using a fresolimumab scaffold.
Structures of a pan-specific antagonist antibody complexed to different isoforms of TGFbeta reveal structural plasticity of antibody-antigen interactions.,Moulin A, Mathieu M, Lawrence C, Bigelow R, Levine M, Hamel C, Marquette JP, Le Parc J, Loux C, Ferrari P, Capdevila C, Dumas J, Dumas B, Rak A, Bird J, Qiu H, Pan CQ, Edmunds T, Wei RR Protein Sci. 2014 Sep 10. doi: 10.1002/pro.2548. PMID:25209176[6]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Kinoshita A, Saito T, Tomita H, Makita Y, Yoshida K, Ghadami M, Yamada K, Kondo S, Ikegawa S, Nishimura G, Fukushima Y, Nakagomi T, Saito H, Sugimoto T, Kamegaya M, Hisa K, Murray JC, Taniguchi N, Niikawa N, Yoshiura K. Domain-specific mutations in TGFB1 result in Camurati-Engelmann disease. Nat Genet. 2000 Sep;26(1):19-20. PMID:10973241 doi:10.1038/79128
- ↑ Janssens K, Gershoni-Baruch R, Guanabens N, Migone N, Ralston S, Bonduelle M, Lissens W, Van Maldergem L, Vanhoenacker F, Verbruggen L, Van Hul W. Mutations in the gene encoding the latency-associated peptide of TGF-beta 1 cause Camurati-Engelmann disease. Nat Genet. 2000 Nov;26(3):273-5. PMID:11062463 doi:10.1038/81563
- ↑ Janssens K, ten Dijke P, Ralston SH, Bergmann C, Van Hul W. Transforming growth factor-beta 1 mutations in Camurati-Engelmann disease lead to increased signaling by altering either activation or secretion of the mutant protein. J Biol Chem. 2003 Feb 28;278(9):7718-24. Epub 2002 Dec 18. PMID:12493741 doi:10.1074/jbc.M208857200
- ↑ McGowan NW, MacPherson H, Janssens K, Van Hul W, Frith JC, Fraser WD, Ralston SH, Helfrich MH. A mutation affecting the latency-associated peptide of TGFbeta1 in Camurati-Engelmann disease enhances osteoclast formation in vitro. J Clin Endocrinol Metab. 2003 Jul;88(7):3321-6. PMID:12843182
- ↑ Kinoshita A, Fukumaki Y, Shirahama S, Miyahara A, Nishimura G, Haga N, Namba A, Ueda H, Hayashi H, Ikegawa S, Seidel J, Niikawa N, Yoshiura K. TGFB1 mutations in four new families with Camurati-Engelmann disease: confirmation of independently arising LAP-domain-specific mutations. Am J Med Genet A. 2004 May 15;127A(1):104-7. PMID:15103729 doi:10.1002/ajmg.a.20671
- ↑ Moulin A, Mathieu M, Lawrence C, Bigelow R, Levine M, Hamel C, Marquette JP, Le Parc J, Loux C, Ferrari P, Capdevila C, Dumas J, Dumas B, Rak A, Bird J, Qiu H, Pan CQ, Edmunds T, Wei RR. Structures of a pan-specific antagonist antibody complexed to different isoforms of TGFbeta reveal structural plasticity of antibody-antigen interactions. Protein Sci. 2014 Sep 10. doi: 10.1002/pro.2548. PMID:25209176 doi:http://dx.doi.org/10.1002/pro.2548
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