WHAMM Is a nucleation promoting factor. Depicted above is a pyrene actin polymerization assay performed with the following reaction conditions 1: Actin + Arp2/3 + WHAMM (active isoform); 2-5: Actin + Arp2/3 + WHAMM (active isoform) and increasing concentrations of Rab1; or 6: actin alone. What effect does Rab1 have on branched actin polymerization? Actin +Arp2/3 + 500nM WHAMM + 0.2x Rab1(M) + 1.0x Rab1(M) + 2.0x Rab1(M) + 3.0x Rab1(M) Actin alone 1.0 0.5 0.0 1000 2000 Time (s) F-actin (RFU)

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QUESTION 5
WHAMM is a nucleation promoting factor. Depicted above is a pyrene actin polymerization assay performed with the following
reaction conditions 1: Actin + Arp2/3 + WHAMM (active isoform); 2-5: Actin + Arp2/3 + WHAMM (active isoform) and increasing
concentrations of Rab1; or 6: actin alone. What effect does Rab1 have on branched actin polymerization?
Actin + Arp2/3 +
1.0
500nM WHAMM
+ 0.2x Rab1(M)
+ 1.0x Rab1(M)
+ 2.0x Rab1(M)
+ 3.0x Rab1(M)
Actin alone
0.5
0.0
1000
2000
Time (s)
Enhances WHAMM activity
inhibits WHAMM activity
No effect
induces actin bundle formation
F-actin (RFU)
Transcribed Image Text:QUESTION 5 WHAMM is a nucleation promoting factor. Depicted above is a pyrene actin polymerization assay performed with the following reaction conditions 1: Actin + Arp2/3 + WHAMM (active isoform); 2-5: Actin + Arp2/3 + WHAMM (active isoform) and increasing concentrations of Rab1; or 6: actin alone. What effect does Rab1 have on branched actin polymerization? Actin + Arp2/3 + 1.0 500nM WHAMM + 0.2x Rab1(M) + 1.0x Rab1(M) + 2.0x Rab1(M) + 3.0x Rab1(M) Actin alone 0.5 0.0 1000 2000 Time (s) Enhances WHAMM activity inhibits WHAMM activity No effect induces actin bundle formation F-actin (RFU)
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