retinoblastoma/프롤린

Proline-directed protein kinase (PDPK) is characterized as a cytoplasmic oncogenic serine/threonine kinase that is activated by growth factor-mediated mechanisms and is proposed to function in mammalian somatic cells as an S phase promoting factor. The present study was undertaken to assess the

To identify a growth-promoting activity related to retinoblastoma-interacting-zinc-finger (RIZ) protein, differential protein expression of MCF-7 cell lines expressing the zinc-finger or the proline-rich domain of RIZ protein was analyzed by a robust bottom-up mass-spectrometry proteomic approach.

PELP1 (proline-, glutamic acid-, and leucine-rich protein-1 (also referred to as MNAR, or modulator of nongenomic activity of estrogen receptor)), a recently identified novel coactivator of estrogen receptors, is widely expressed in a variety of 17 beta-estradiol (E2)-responsive reproductive tissues

While the transactivation function of the tumor suppressor p53 is well understood, less is known about the transrepression functions of this protein. We have previously shown that p53 interacts with the corepressor protein mSin3a (hereafter designated Sin3) in vivo and that this interaction is

SPI-B is a B lymphocyte-specific Ets transcription factor that shares a high degree of similarity with PU.1/SPI-1. In direct contrast to PU.1(-/-) mice that die in utero and lack monocytes, neutrophils, B cells, and T cells, Spi-B-/- mice are viable and exhibit a severe B cell proliferation defect.

The pRB (retinoblastoma protein) has a central role in the control of the G(1)-S phase transition of the cell cycle that is mediated in part through the regulation of E2F transcription factors. Upon S-phase entry pRB is phosphorylated extensively, which in turn releases bound E2Fs to drive the

The growth suppressive activity of the retinoblastoma tumour suppressor protein is controlled by cell cycle dependent phosphorylation. However, while many in vivo phosphorylation sites have been mapped, the identities of those residues whose phosphorylation is regulated remain elusive. We have

We have shown previously that a novel cell cycle-regulated histone H1 kinase activity, retinoblastoma kinase (RbK), associates with and phosphorylates the amino terminus of the Rb protein in G2-M. We have shown also that the amino terminus of p107, a Rb-related protein, does not associate with a

In this report, we studied the effect of phosmidosine, a proline-containing nucleotide on the serum-induced cell cycle progression in human lung fibroblast WI-38 cells. Phosmidosine suppressed S-phase entry and arrested cell cycle progression at the G1 phase. In serum-stimulated cells, phosmidosine

Retinoblastoma is one of the most common ocular malignancies in children under the age of six. Occasionally, retinoblastoma metastasizes to extraocular organs including the bone, lung and brain. Left untreated, retinoblastoma is fatal. At present, there is no effective treatment for metastatic

Prolyl oligopeptidase (POP) is a post-proline cleaving enzyme, which is widely distributed in various organs, with high levels in the brain. In this study, we investigated the effects of a selective POP inhibitor, 3-({4-[2-(E)-styrylphenoxy]butanoyl}-l-4-hydroxyprolyl)-thiazolidine (SUAM-14746), on

Cyclin-dependent kinase 9 (cdk9) is a multifunctional kinase with roles in different cellular pathways such as transcriptional elongation, differentiation and apoptosis. Cdk9/cyclin T differs functionally from other cdk/cyclin complexes that regulate cell cycle progression, but maintains structural

E7 is the major transforming protein of human papillomavirus (HPV), which is implicated in the development of cervical cancer. The transforming activity of E7 has been attributed in part to its interaction with the retinoblastoma (Rb) tumour suppressor; however, the Rb interaction alone is not

PITALRE is a human protein kinase belonging to the cell division cycle 2 (CDC2) kinase family, and is the catalytic subunit of a multimeric complex that contains several cellular proteins. PITALRE complexes from several cell lines and tissues phosphorylate retinoblastoma protein and myelin basic

OBJECTIVE To characterize the biochemical features of the newest member of cyclophilin family of peptidyl-prolyl cis/trans-isomerases (PPIases), cyclophilin J (CYPJ). METHODS PPIase assays were performed on purified hCYPJ and its mutated variants. The substrate specificity, half-maximal inhibitory