BIOINORGANIC CHEMISTRY A Short Course Second Edition

392 IRON-CONTAINING PROTEINS AND ENZYMES

TABLE 7.6 Metal Cofactor Distances in cytochrome bc

: [2Fe – 2S] Position and Mobility 1

PDB No.(reference, date)

Species

(Crystal Space

Group, resolution, Å )

Inhibitor or Substrate (PDB abbreviation,

binding site)

heme c

— 1

[2Fe – 2S](Fe

and/or 1

Fe

) ( Å ) 2

[2Fe – 2S](Fe

and/or 1

Fe

) — heme 2 b

( Å ) L

heme b

—L

heme b

H

( Å )

[2Fe – 2S].

Position

a and

Mobility

b

1QCR( 79 , 1997)

bos Taurus

, bovine

(I4

22, 2.70) 1

None

31

27

21

“ b ”

a

1BE3( 83 , 1998)

bos Taurus(P6

22, 3.00) 5

None

14.9 (Fe

) 2

17.1 (Fe

) 1

35.1 (Fe

) 2

35.7 (Fe

) 1

20.3

“ c

” 1

a

1BCC( 84 , 1998)

Gallus gallus

, chicken

(P2

(^2 1)
(^2 1)
, 3.16) 1
None
21.3
34.3
“ c
” 1
a
1BGY( 83 , 1998)
bos Taurus(P6
, 3.00) 5
None
26.1 (Fe
) 2
27.0 (Fe
) 1
31.0 (Fe
) 2
31.5 (Fe
) 1
“ int ”
a
1NTM( 86 , 2004)
bos Taurus(I4
22, 2.40) 1
None
32.6 (Fe
) 2
31.2 (Fe
) 1
26.9 (Fe
) 2
28.0 (Fe
) 1
20.6
mobile
b
1NTZ( 86 , 2004)
bos Taurus(I4
22, 2.60) 1
substrateubiquinone - 2(UQ2, Q
and Q o
) i
32.5 (Fe
) 2
31.0 (Fe
) 1
26.7 (Fe
) 2
28.0 (Fe
) 1
20.6
mobile
b
1SQP( 88 , 2004)
bos Taurus(I4
22, 2.70) 1
inhibitor myxothiazol(MYX, Q
) o
31.0 (Fe
) 2
30.4 (Fe
) 1
29.0 (Fe
) 2
29.8 (Fe
) 1
20.6
mobile
b