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Table 3 Trp76 of Orai-CMBD fluorescence and Stern-Volmer quenching constants

From: The exchanged EF-hands in calmodulin and troponin C chimeras impair the Ca2+-induced hydrophobicity and alter the interaction with Orai1: a spectroscopic, thermodynamic and kinetic study

Protein

λ max (nm)

Trp fluorescence enhancement upon protein binding (fold)

K sv (M −1 ) acrylamide

K sv (M −1 ) KI

Orai-CMBD

350

n.a.a

13.5 ± 0.4

13.1 ± 0.5

CaM/Orai-CMBD

335

1.82 ± 0.06

1.35 ± 0.08

1.31 ± 0.08

(CaM)1TnC/Orai-CMBD

335

1.61 ± 0.05

1.80 ± 0.09

1.75 ± 0.06

(CaM)2TnC/Orai-CMBD

336

1.44 ± 0.11

1.95 ± 0.10

1.85 ± 0.05

(CaM)3TnC/Orai-CMBD

336

1.75 ± 0.08

1.32 ± 0.05

1.21 ± 0.09

(CaM)4TnC/Orai-CMBD

337

1.76 ± 0.07

1.51 ± 0.04

1.22 ± 0.10

  1. aNot applicable.