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Full-Text Articles in Biochemistry, Biophysics, and Structural Biology
Evidence For A Novel Mechanism Of The Pak1 Interaction With The Rho-Gtpases Cdc42 And Rac, Yong Jae Shin, Eun Hye Kim, Adhiraj Roy, Jeong-Ho Kim
Evidence For A Novel Mechanism Of The Pak1 Interaction With The Rho-Gtpases Cdc42 And Rac, Yong Jae Shin, Eun Hye Kim, Adhiraj Roy, Jeong-Ho Kim
Biochemistry and Molecular Medicine Faculty Publications
P21-activated kinase 1 (PAK1) is activated by binding to GTP-bound Rho GTPases Cdc42 and Rac via its CRIB domain. Here, we provide evidence that S79 in the CRIB domain of PAK1 is not directly involved in this binding but is crucial for PAK1 activation. S79A mutation reduces the binding affinity of PAK1 for the GTPases and inhibits autophosphorylation and kinase activity of PAK1. Thus, this mutation abrogates the ability of PAK1 to induce changes in cell morphology and motility and to promote malignant transformation of prostate epithelial cells. We also show that growth of the prostate cancer cell line PC3 …
P21-Activated Kinase-1 Signaling Regulates Transcription Of Tissue Factor And Tissue Factor Pathway Inhibitor., Beatriz Sanchez-Solana, Mona Motwani, Da-Qiang Li, Jeyanthy Eswaran, Rakesh Kumar
P21-Activated Kinase-1 Signaling Regulates Transcription Of Tissue Factor And Tissue Factor Pathway Inhibitor., Beatriz Sanchez-Solana, Mona Motwani, Da-Qiang Li, Jeyanthy Eswaran, Rakesh Kumar
Biochemistry and Molecular Medicine Faculty Publications
Tissue factor (TF) is a cell-surface glycoprotein responsible for initiating the coagulation cascade. Besides its role in homeostasis, studies have shown the implication of TF in embryonic development, cancer related events, and inflammation via coagulation-dependent and -independent (signaling) mechanisms. Tissue factor pathway inhibitor (TFPI) plays an important role in regulating TF-initiated blood coagulation. Therefore, transcriptional regulation of TF expression and its physiologic inhibitor TFPI, would allow us to understand the critical step that control many different processes. From a gene profiling study aimed to identify differentially regulated genes between wild type (WT) and p21-activated kinase 1-null (PAK1-KO) mouse embryonic fibroblasts …