Download MendeleyPro-metastatic collagen lysyl hydroxylase dimer assemblies stabilized by Fe2+-binding.
Guo, H.F., Tsai, C.L., Terajima, M., Tan, X., Banerjee, P., Miller, M.D., Liu, X., Yu, J., Byemerwa, J., Alvarado, S., Kaoud, T.S., Dalby, K.N., Bota-Rabassedas, N., Chen, Y., Yamauchi, M., Tainer, J.A., Phillips, G.N., Kurie, J.M.(2018) Nat Commun 9: 512-512
- PubMed: 29410444
- DOI: https://doi.org/10.1038/s41467-018-02859-z
- Primary Citation of Related Structures:
6AX6, 6AX7 - PubMed Abstract:
Collagen lysyl hydroxylases (LH1-3) are Fe 2+ - and 2-oxoglutarate (2-OG)-dependent oxygenases that maintain extracellular matrix homeostasis. High LH2 levels cause stable collagen cross-link accumulations that promote fibrosis and cancer progression. However, developing LH antagonists will require structural insights. Here, we report a 2 Å crystal structure and X-ray scattering on dimer assemblies for the LH domain of L230 in Acanthamoeba polyphaga mimivirus. Loop residues in the double-stranded β-helix core generate a tail-to-tail dimer. A stabilizing hydrophobic leucine locks into an aromatic tyrosine-pocket on the opposite subunit. An active site triad coordinates Fe 2+ . The two active sites flank a deep surface cleft that suggest dimerization creates a collagen-binding site. Loss of Fe 2+ -binding disrupts the dimer. Dimer disruption and charge reversal in the cleft increase K m and reduce LH activity. Ectopic L230 expression in tumors promotes collagen cross-linking and metastasis. These insights suggest inhibitor targets for fibrosis and cancer.
Organizational Affiliation:
Department of Thoracic/Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA.
