Table 2 Binding constants of SP0498 Big domains and Ca2+ determined by ITC

From: Solution structure of the Big domain from Streptococcus pneumoniae reveals a novel Ca2+-binding module

Mutated Site

Dissociation constants Kd (μM)

Wild type

0.24 ± 0.02

T4A

0.32 ± 0.02

I8A/E9A

0.24 ± 0.00

S11A/Q12A

0.26 ± 0.02

D17A

0.19 ± 0.02

E28A/G29A/R30A

non-available a

Y35A/S36A

0.23 ± 0.01

S44A/E48A/G49A/I52A

0.31 ± 0.04

H68A/Y69A/G71A/H72A/E73A

no binding was tested

H68A/Y69A

0.19 ± 0.01

G71A/H72A/E73A

0.18 ± 0.01

  1. aThis mutation causes the protein unstable.