Results 21 to 30 of about 328,904 (334)

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.
Hidenori Yanagi   +5 more
openaire   +3 more sources

An evolutionary perspective on the kinome of malaria parasites [PDF]

open access: yes, 2012
Malaria parasites belong to an ancient lineage that diverged very early from the main branch of eukaryotes. The approximately 90-member plasmodial kinome includes a majority of eukaryotic protein kinases that clearly cluster within the AGC, CMGC, TKL ...
Andrew B. Tobin   +6 more
core   +1 more source

Signaling pathways for transduction of the initial message of the glycocode into cellular responses [PDF]

open access: yes, 1998
The sugar units of glycan structures store information and establish an alphabet of life. The language of the oligosaccharide coding units is deciphered by receptors such as lectins and the decoded message can be transduced by multiple signaling pathways.
Gabius, Hans-Joachim, Villalobo, A.
core   +2 more sources

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

Severe B Cell Deficiency in Mice Lacking the Tec Kinase Family Members Tec and Btk [PDF]

open access: yes, 2000
The cytoplasmic protein tyrosine kinase Tec has been proposed to have important functions in hematopoiesis and lymphocyte signal transduction. Here we show that Tec-deficient mice developed normally and had no major phenotypic alterations of the immune ...
Baltimore, David   +7 more
core   +3 more sources

BYKdb: the Bacterial protein tYrosine Kinase database [PDF]

open access: yesNucleic Acids Research, 2011
Bacterial tyrosine-kinases share no resemblance with their eukaryotic counterparts and they have been unified in a new protein family named BY-kinases. These enzymes have been shown to control several biological functions in the bacterial cells. In recent years biochemical studies, sequence analyses and structure resolutions allowed the deciphering of ...
Jadeau, Fanny   +5 more
openaire   +6 more sources

Activation of tyrosine kinases by mutation of the gatekeeper threonine. [PDF]

open access: yes, 2008
Protein kinases targeted by small-molecule inhibitors develop resistance through mutation of the gatekeeper threonine residue of the active site. Here we show that the gatekeeper mutation in the cellular forms of c-ABL, c-SRC, platelet-derived growth ...
Azam, Mohammad   +4 more
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

Evidence of the presence of calcium/calmodulin-dependent protein kinase IV in human sperm and its involvement in motility regulation [PDF]

open access: yes, 2005
The mechanisms involved in the regulation of mammalian sperm motility are not well understood. Calcium ions (Ca(2+)) have been suggested to play a key role in the maintenance of motility; nevertheless, how Ca(2+) modulates this process has not yet been ...
Buffone, Mariano Gabriel   +6 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

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