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• W2984343209 endingPage "129450" @default.
• W2984343209 startingPage "129450" @default.
• W2984343209 abstract "Leucine rich Aspartate motifs (LD motifs) are molecular recognition motifs on Paxillin that recognize LD-motif binding domains (LDBD) of a number of focal adhesion proteins in order to carry out downstream signaling and actin cytoskeleton remodeling. In this study, we identified structural features within LDBDs that influence their binding affinity with Paxillin LD motifs. Various point mutants of focal adhesion targeting (FAT) domain of Focal Adhesion Kinase (FAK) were created by moving a key Lysine residue two and three helical turns in order to match the unique conformations as observed in LDBDs of two other focal adhesion proteins, Vinculin and CCM3. This led to identify a mutant of FAT domain of FAK, named as FAT(NV) (Asn992 of FAT domain was replaced by Val), with remarkable high affinity for LD1 (Kd = 1.5 μM vs no-binding with wild type) and LD2 peptides (Kd = 7.2 μM vs 63 μM with wild type). Consistently, the focal adhesions of MCF7 cells expressing FAK(NV) were highly stable (turnover rate = 1.25 × 10−5 μm2/s) as compared to wild type FAK transfected cells (turnover rate = 1.5 × 10−3 μm2/s). We observed that the relative disposition of key LD binding amino-acids at LDBD surface, hydrophobic burial of long Leucine side chains of LD-motifs and complementarity of charged surfaces are the key factors determining the binding affinities of LD motifs with LDBDs. Our study will help in protein engineering of FAT domain of FAK by modulating FAK-LD motif interactions which have implications in cellular focal adhesions and cell migration." @default.
• W2984343209 created "2019-11-22" @default.
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• W2984343209 date "2020-01-01" @default.
• W2984343209 modified "2023-10-10" @default.
• W2984343209 title "Spatial arrangement of LD motif-interacting residues on focal adhesion targeting domain of Focal Adhesion Kinase determine domain-motif interaction affinity and specificity" @default.
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• W2984343209 doi "https://doi.org/10.1016/j.bbagen.2019.129450" @default.
• W2984343209 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31676296" @default.
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