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The two reactions compared are done so using a Tanimoto similarity score (for more information, please see the MACiE FAQ) for the bond changes only. The score maay range from 0 to 1 where 1 indicates that the two reactions are identical at the bond change level and 0 indicates that there are no bond changes in common.


Key

1.0-0.9 0.9-0.8 0.8-0.7 0.7-0.6 0.6-0.5 0.5-0.4 0.4-0.3 0.3-0.2 0.2-0.1 0.1-0.0 =0

Results for Comparison of M0102 and M0121

These two reactions have a combined similarity of 0.18


M0102

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Comparison

M0121

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EC 1.1.2.3
L-lactate dehydrogenase (cytochrome)
Sub-Class EC 1.8.3.1
sulfite oxidase

Image of (S)-lactate

Image of ferricytochrome c

right arrow

Image of proton

Image of ferrocytochrome c

Image of pyruvate

(S)-lactate
C00186
CHEBI:16651
2 ferricytochrome c
C00125
CHEBI:16448
2 proton
C00080
CHEBI:24636
2 ferrocytochrome c
C00126
CHEBI:16707
pyruvate
C00022
CHEBI:15361
0.28

Image of water

Image of ferricytochrome c

Image of sulphite

right arrow

Image of proton

Image of ferrocytochrome c

Image of sulphate

water
C00001
CHEBI:15377
2 ferricytochrome c
C00125
CHEBI:15991
sulphite
C00094
CHEBI:17359
2 proton
C00080
CHEBI:24636
2 ferrocytochrome c
C00126
CHEBI:16928
sulphate
C00059
CHEBI:16189

Catalytic CATH Codes

3.20.20.70

Catalytic CATH Codes

3.90.420.10

Active Site



0.31187

Active Site



Catalytic Residues

Type Number Chain Location of Function
Tyr 254 A Side Chain
Asp 282 A Side Chain
His 373 A Side Chain
0.3333

Catalytic Residues

Type Number Chain Location of Function
Tyr 322 A Side Chain

Organic Cofactors

Type Identity Chain
FMN FMN 570 A

Organic Cofactors

No Associated Organic Cofactors

Metal Cofactors

Type Het group Number Chain
iron HEM 560 A

Metal Cofactors

Type Het group Number Chain
molybdenum MO 505 A
iron HEM 502 A

Reaction occurs across 6 steps

0.1269

Reaction occurs across 4 steps

Step 1
GIF of Reaction Step M0102.stg01

His373 deprotonates the alcohol of the lactate which eliminates a hydride ion that is added to FAD.
0 Step 1
GIF of Reaction Step M0121.stg01

Sulfite initiates a nucleophilic attack upon one of the oxo groups coordinated to the Mo(VI) centre in an addition reaction, resulting in a two electron reduction of the centre to Mo(IV).
Step 2
GIF of Reaction Step M0102.stg02

A single electron is transferred from the FAD to the haem cofactor.
0 Step 2
GIF of Reaction Step M0121.stg02

Water displaces the sulfate as a ligand to the Mo(IV) centre.
Step 3
GIF of Reaction Step M0102.stg03

The haem cofactor transfers the electron to ferricytochrome c.
0 Step 3
GIF of Reaction Step M0121.stg03

Water deprotonates Tyr322, which deprotonates the Mo-bound water causing a single electron to be transferred from the Mo(IV) centre to Haem and thence to ferricyrochrome C.
Step 4
GIF of Reaction Step M0102.stg04

Water deprotonates the FAD, initiating the second single electron transfer from FAD to the haem cofactor.
0.22 Step 4
GIF of Reaction Step M0121.stg04

Water deprotonates Tyr322, which deprotonates the Mo-bound hydroxide causing a single electron to be transferred from the Mo(V) centre to Haem and thence to ferricyrochrome C and regenerating the cofactor.
Step 5
GIF of Reaction Step M0102.stg05

The haem cofactor transfers the electron to ferricytochrome c.
N/A Step 5
No Step with this number present
Step 6
GIF of Reaction Step M0102.stg06

Water deprotonates His373 in an inferred return step.
N/A Step 6
No Step with this number present

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