The second and eight authors’ names are spelled incorrectly. The correct names are: Whitney E. Purtha and Paolo S. Manzanillo. The correct citation is: Hao Y, Purtha WE, Cortesio C, Rui H, Gu Y, Chen H, et al. (2018) Crystal structures of human procathepsin H. PLoS ONE 13(7): e0200374. https://doi.org/10.1371/journal.pone.0200374

There are errors in the author affiliations. The correct affiliations are as follows: Yue Hao^1,2, Whitney E. Purtha³, Christa Cortesio⁴, Huan Rui¹, Yan Gu⁴, Hao Chen⁴, E. Allen Sickmier¹, Paolo S. Manzanillo³, Xin Huang¹

1 Department of Molecular Engineering, Amgen Discovery Research, 360 Binney Street, Cambridge, MA 02142, USA, 2 Amgen Postdoctoral Fellow Program, 360 Binney Street, Cambridge, MA 02142, USA, 3 Department of Inflammation and Oncology, Amgen Discovery Research, 1120 Veteran Boulevard, South San Francisco, CA 94080, USA, 4 Department of Protein Technologies, Amgen Discovery Research, 360 Binney Street, Cambridge, MA 02142, USA