2TGI

CRYSTAL STRUCTURE OF TRANSFORMING GROWTH FACTOR-BETA2: AN UNUSUAL FOLD FOR THE SUPERFAMILY

Summary for 2TGI

• Entry DOI: 10.2210/pdb2tgi/pdb
• Descriptor: TRANSFORMING GROWTH FACTOR ,BETA 2 (2 entities in total)
• Functional Keywords: growth factor
• Biological source: Homo sapiens (human)
• Cellular location: Secreted: P61812
• Total number of polymer chains: 1
• Total formula weight: 12732.60

Authors

Daopin, S.,Davies, D.R. (deposition date: 1993-10-20, release date: 1994-01-31, Last modification date: 2024-10-16)

Primary citation

Daopin, S.,Piez, K.A.,Ogawa, Y.,Davies, D.R.
Crystal structure of transforming growth factor-beta 2: an unusual fold for the superfamily.
Science, 257:369-373, 1992

PubMed Abstract: The transforming growth factors-beta (TGF-beta 1 through -beta 5) are a family of homodimeric cytokines that regulate proliferation and function in many cell types. Family members have 66 to 80% sequence identity and nine strictly conserved cysteines. A crystal structure of a member of this family, TGF-beta 2, has been determined at 2.1 angstrom (A) resolution and refined to an R factor of 0.172. The monomer lacks a well-defined hydrophobic core and displays an unusual elongated nonglobular fold with dimensions of approximately 60 A by 20 A by 15 A. Eight cysteines form four intrachain disulfide bonds, which are clustered in a core region forming a network complementary to the network of hydrogen bonds. The dimer is stabilized by the ninth cysteine, which forms an interchain disulfide bond, and by two identical hydrophobic interfaces. Sequence profile analysis of other members of the TGF-beta superfamily, including the activins, inhibins, and several developmental factors, imply that they also adopt the TGF-beta fold.

PubMed: 1631557

Experimental method

X-RAY DIFFRACTION (1.8 Å)