NC10 stands for Non-helical region 10 and is taken from Swiss:P39059. A mutation in this region in Swiss:P39060 is associated with an increased risk of prostrate cancer. This domain is cleaved from the precursor and forms endostatin. Endostatin is a key tumour suppressor and has been used highly successfully to treat cancer. It is a potent angiogenesis inhibitor ([1]). Endostatin also binds a zinc ion near the N-terminus; this is likely to be of structural rather than functional importance according to ([2]).

1: A polymorphism in endostatin, an angiogenesis inhibitor, predisposes for the development of prostatic adenocarcinoma. Iughetti P, Suzuki O, Godoi PH, Alves VA, Sertie AL, Zorick T, Soares F, Camargo A, Moreira ES, di Loreto C, Moreira-Filho CA, Simpson A, Oliva G, Passos-Bueno MR; Cancer Res 2001;61:7375-7378. PMID:11606364

2: Variable zinc coordination in endostatin. Hohenester E, Sasaki T, Mann K, Timpl R; J Mol Biol 2000;297:1-6. PMID:10704302