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Table 3 Inter-atomic distances [Å] in the saddle point of metaphosphate formation [a]

From: Effects of protonation on the hydrolysis of triphosphate in vacuum and the implications for catalysis by nucleotide hydrolyzing enzymes

nP [b]

 

Pγ-Oβγ [c]

Pγ-Oa [d]

0

 

2.32

2.83

1

α

1.92

2.47

1

β

1.72

2.51

2

αβ

1.85

2.45

2

βγ

2.02

2.34

2

αγ

2.12

2.33

3

αβγ

1.98

2.40

  1. [a] Structures corresponding to the energy ΔE 1 ǂ in Table 2. [b] nP is the number of protons on the triphosphate (α, β and γ indicate which phosphate is protonated. [c] Distance between Pγ and the leaving oxygen Oβγ (see Fig. 1d for atomic nomenclature). [d] Distance between Pγ and the attacking oxygen of water Wa
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BMC Biochemistry

ISSN: 1471-2091

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