MOB Kinase Activator 3B, also known as MOB3B, is a protein encoded by the MOB3B gene in humans. This protein is part of the MOB family, which plays a crucial role in various cellular processes, including cell proliferation, apoptosis, and organ size control. The MOB3B protein is particularly significant in the Hippo signaling pathway, which is essential for tumor suppression and organ size regulation.
The MOB3B gene is located on chromosome 9 and is also known by several aliases, including C9orf35, FLJ13204, and MOBKL2B . The protein encoded by this gene shares similarity with the yeast Mob1 protein, which binds to Mps1p, a protein kinase essential for spindle pole body duplication and mitotic checkpoint regulation . The MOB3B protein modulates the expression of LATS1, a core component of the Hippo signaling pathway .
MOB3B is a protein-coding gene that plays a pivotal role in the Hippo signaling pathway. This pathway is crucial for controlling organ size and suppressing tumors by restricting cell proliferation and promoting apoptosis . The MOB3B protein interacts with NDR serine-threonine kinases, which are core components of the Hippo and Hippo-like signaling pathways . These interactions are essential for the proper functioning of these pathways, making MOB3B a critical regulator of cellular processes.
The expression of MOB3B is observed in various tissues, including lymphoid tissue, bone marrow, testis, and skeletal muscle . It is involved in several biological processes, such as cell proliferation, innate immune response, protein ubiquitination, and lymph vessel development . The protein is also expressed in immune cells like NK-cells and T-cells, where it plays a role in the immune system and transcription .
Diseases associated with MOB3B include Frontotemporal Dementia and/or Amyotrophic Lateral Sclerosis 7 . The protein’s role in the Hippo signaling pathway and its interactions with other proteins make it a potential target for therapeutic interventions in cancer and other diseases related to cell proliferation and apoptosis.