Results 21 to 30 of about 3,692,701 (303)

Receptor-specific regulation of phosphatidylinositol 3'-kinase activation by the protein tyrosine phosphatase Shp2 [PDF]

open access: yes, 2002
Receptor tyrosine kinases (RTKs) play distinct roles in multiple biological systems. Many RTKs transmit similar signals, raising questions about how specificity is achieved.
Zhang, S.   +13 more
core   +1 more source

Proteínas quinases: características estruturais e inibidores químicos Kinase protein: structural features and chemical inhibitors

open access: yesQuímica Nova, 2009
Protein kinases are one of the largest protein families and they are responsible for regulation of a great number of signal transduction pathways in cells, through the phosphorylation of serine, threonine, or tyrosine residues.
Bárbara V. Silva   +3 more
doaj   +1 more source

Deep evolutionary conservation of an intramolecular protein kinase activation mechanism [PDF]

open access: yes, 2012
DYRK-family kinases employ an intramolecular mechanism to autophosphorylate a critical tyrosine residue in the activation loop. Once phosphorylated, DYRKs lose tyrosine kinase activity and function as serine/threonine kinases.
Cleghon Vaughn   +31 more
core   +1 more source

The Jak/STAT signaling pathway is downregulated at febrile temperatures. [PDF]

open access: yesPLoS ONE, 2012
BACKGROUND: The Janus family of kinases (JAKs), Jak1, Jak2, Jak3, and Tyk2, constitute a subgroup of non-receptor protein tyrosine kinases. Upon cytokine binding, the receptor-associated kinases are activated and phosphorylate tyrosine residues in their ...
Tobias Nespital, Ger J Strous
doaj   +1 more source

Development of inhibitors for protein tyrosine kinases [PDF]

open access: yesOncogene, 2000
In the last 5 years, through combinatorial chemistry, high-throughput screening, computational chemistry, and traditional medicinal chemistry, numerous inhibitors for various protein tyrosine kinases (PTKs) have been developed. The majority of these compounds are small molecules that compete at the ATP binding site of the catalytic domain of the ...
F A, Al-Obeidi, K S, Lam
openaire   +2 more sources

ErbB2 signaling in breast cancer : the role of ErbB, Akt and ShcA phosphorylation [PDF]

open access: yes, 2004
Breast cancer is the most common malignancy in women and is estimated to account for more than 200,000 new cancer cases in the United States in the year 2002. It now represents the second leading cause of death (40,000) from cancer in women.
Cicenas, Jonas
core   +1 more source

JNK and ERK8 as downstream effectors of receptor tyrosine kinases [PDF]

open access: yes, 2006
MAP kinases are a super-family of serine-threonine protein kinases expressed in all eukaryotic cells. In mammals, there are many MAP kinases with different biological functions, grouped in distinctly regulated groups, ERK1/2 (extracellular signal related
Iavarone, Carlo
core   +1 more source

MicroRNAs as the critical regulators of protein kinases in prostate and bladder cancers

open access: yesEgyptian Journal of Medical Human Genetics, 2021
Background Bladder cancer (BCa) and prostate cancer (PCa) are frequent urothelial and genital malignancies with a high ratio of morbidity and mortality which are more common among males.
Malihe Zangoue   +3 more
doaj   +1 more source

Protein-tyrosine phosphorylation in Bacillus subtilis: a 10-year retrospective

open access: yesFrontiers in Microbiology, 2015
The discovery of tyrosine-phosphorylated proteins in Bacillus subtilis in the year 2003 was followed by a decade of intensive research activity. Here we provide an overview of the lessons learned in that period.
Josef eDeutscher, Ivan eMijakovic
doaj   +1 more source

Protein Tyrosine Kinase in Colorectal Adenoma [PDF]

open access: yesActa Oncologica, 1993
To determine whether protein tyrosine kinase (PTK) could be utilized as a biological indicator of colonic tumorigenesis, we examined the PTK activity in the cytosolic and particulate fractions of homogenates from 25 adenomas (polyps) and from adjacent normal mucosa.
T, Hatada   +5 more
openaire   +2 more sources

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