Regulation of B Cell Receptor-Dependent NF-Κb Signaling by the Tumor Suppressor KLHL14
Regulation of B cell receptor-dependent NF-κB signaling by the tumor suppressor KLHL14 Jaewoo Choia, James D. Phelana, George W. Wrightb, Björn Häuplc,d,e, Da Wei Huanga, Arthur L. Shaffer IIIa, Ryan M. Younga, Zhuo Wanga, Hong Zhaoa, Xin Yua, Thomas Oellerichc,d,e, and Louis M. Staudta,1 aLymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892; bBiometric Research Branch, Division of Cancer Diagnosis and Treatment, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892; cDepartment of Medicine II, Hematology/Oncology, Goethe University, 60590 Frankfurt, Germany; dGerman Cancer Consortium/German Cancer Research Center, 69120 Heidelberg, Germany; and eDepartment of Molecular Diagnostics and Translational Proteomics, Frankfurt Cancer Institute, 60596 Frankfurt, Germany Contributed by Louis M. Staudt, January 29, 2020 (sent for review December 4, 2019; reviewed by Shiv Pillai and Michael Reth) The KLHL14 gene acquires frequent inactivating mutations in ma- by ibrutinib, suggesting that it may be a critical target of this ture B cell malignancies, especially in the MYD88L265P, CD79B mu- drug (8). tant (MCD) genetic subtype of diffuse large B cell lymphoma Genetic analysis revealed recurrent mutations of the KLHL14 (DLBCL), which relies on B cell receptor (BCR) signaling for survival. gene in DLBCL, often in ABC tumors of the MCD genetic However, the pathogenic role of KLHL14 in DLBCL and its molec- subtype (2) and in PCNSL (6, 9). KLHL14 (also known as ular function are largely unknown. Here, we report that KLHL14 is in Printor) (10) belongs to the Kelch-like family of proteins that can close proximity to the BCR in the endoplasmic reticulum of MCD cell serve as subunits of Cullin-RING ubiquitin ligase (CRL) com- line models and promotes the turnover of immature glycoforms of plex (reviewed in ref.
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