Title : Mass spectrometry-based identification of Y745 of Vav1 as a tyrosine residue crucial in maturation of acute promyelocytic leukemia-derived cells.

Pub. Date : 2010 Feb 5

PMID : 20028078






5 Functional Relationships(s)
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Protein Name
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1 Vav1, whose physiological expression is restricted to hematopoietic system, is one of the signaling proteins up-regulated by all-trans retinoic acid (ATRA) in acute promyelocytic leukemia (APL)-derived precursors, in which it promotes the overcoming of the differentiation blockade. Tretinoin vav guanine nucleotide exchange factor 1 Homo sapiens
2 Vav1, whose physiological expression is restricted to hematopoietic system, is one of the signaling proteins up-regulated by all-trans retinoic acid (ATRA) in acute promyelocytic leukemia (APL)-derived precursors, in which it promotes the overcoming of the differentiation blockade. Tretinoin vav guanine nucleotide exchange factor 1 Homo sapiens
3 Here, we have found that phosphorylation of Vav1 Y174, that is known to regulate Vav1 activity in mature neutrophils, is up-regulated by ATRA in NB4 cells. Tretinoin vav guanine nucleotide exchange factor 1 Homo sapiens
4 Here, we have found that phosphorylation of Vav1 Y174, that is known to regulate Vav1 activity in mature neutrophils, is up-regulated by ATRA in NB4 cells. Tretinoin vav guanine nucleotide exchange factor 1 Homo sapiens
5 In fact, the overexpression of a mutated form of Vav1, in which Y745 was replaced with a phenylalanine, significantly reduced the ATRA-induced CD11b expression and essentially abrogated the differentiation-related acquisition of the migratory capability. Tretinoin vav guanine nucleotide exchange factor 1 Homo sapiens