Words similar to yqxp
Example sentences for: yqxp
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The adaptor protein Cas has several domains that are important for its function, an SH3 domain, a central substrate domain with up to 15 tyrosines that can serve as tyrosine kinase substrates for upstream kinases such as Src and Abl [ 19 42 43 ] , and a C-terminal Src binding domain with PXXP motifs for binding to the SH3 domain of Src, and two tyrosines providing docking sites for the Src SH2 domain upon phosphorylation [ 6 ] . The substrate domain of Cas has two major types of tyrosine motifs that can be phosphorylated and bind downstream effectors, YQXP (4 copies) and YDXP motifs (9 copies), suggesting that at least two classes of downstream effectors, one capable of binding to YDXP motifs and the other capable of binding to YQXP motifs, are assembled by this adaptor protein.
The v-crk SH2 domain interacts with YXXP motifs upon phosphorylation, suggesting that both of these regions may be able to interact with v-crk [ 37 ] . Fusions of the kinase inactive Src kinase domain and either the full Cas SD, the 5' region of the Cas SD (Cas(5'SD), containing 4 YQXP motifs) or the 3' of the Cas SD (Cas(3'SD), containing 9 YDXP motifs), are not stably tyrosine phosphorylated when expressed alone in cells (data not shown and see Fig.
We then used the 5' and 3' fusions of the Cas SD to determine which motif, YQXP or YDXP, interacts with the v-crk SH2 domain.
By contrast, co-expression of these fusions along with v-crk results in stable tyrosine phosphorylation of the 3' C-terminal YDXP motifs and the full length Cas SD (carrying both motifs), but not the 5' N-terminal YQXP motifs (Fig.
The Cas SD has two sets of potential SH2 interacting tyrosines, the N-terminal subdomain containing 4 YQXP motifs located between a.a.
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