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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 M0020 and M0131

These two reactions have a combined similarity of 0.12


M0020

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Comparison

M0131

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EC 1.3.99.1
succinate dehydrogenase
Sub-Class EC 1.14.13.2
4-hydroxybenzoate 3-monooxygenase

Image of acceptor

Image of proton

Image of fumarate

right arrow

Image of succinate

Image of reduced acceptor

acceptor
C00028
CHEBI:15339
2 proton
C00080
CHEBI:24636
fumarate
C00122
CHEBI:29806
succinate
C00042
CHEBI:30031
reduced acceptor
C00030
CHEBI:17499
0.04

Image of NADPH

Image of oxygen

Image of 4-hydroxybenzoate

right arrow

Image of NADP

Image of water

Image of 3,4-dihydroxybenzoate

NADPH
C00005
CHEBI:16474
oxygen
C00007
CHEBI:15379
4-hydroxybenzoate
C00156
CHEBI:17879
NADP
C00006
CHEBI:18009
water
C00001
CHEBI:15377
3,4-dihydroxybenzoate
C00230
CHEBI:36241

Catalytic CATH Codes

3.90.700.10
3.50.50.60
0.0.0.0

Catalytic CATH Codes

3.50.50.60
3.30.9.10

Active Site



0.09468

Active Site



Catalytic Residues

Type Number Chain Location of Function
His 365 A Side Chain
Glu 378 A Side Chain
Arg 381 A Side Chain
Arg 402 A Side Chain
His 504 A Side Chain
Arg 544 A Side Chain
0.1052

Catalytic Residues

Type Number Chain Location of Function
His 72 A Side Chain
Tyr 201 A Side Chain
Pro 293 A Main Chain Carbonyl
Lys 297 A Side Chain
Tyr 385 A Side Chain

Organic Cofactors

Type Identity Chain
FAD FAD 805

Organic Cofactors

Type Identity Chain
FAD FAD 395

Metal Cofactors

Type Het group Number Chain
iron HEC 801 _
iron HEC 802 _
iron HEC 803 _
iron HEC 804 _

Metal Cofactors

No Associated Metal Cofactors

Reaction occurs across 3 steps

0.1548

Reaction occurs across 9 steps

Step 1
GIF of Reaction Step M0020.stg01

The electron acceptors donates two electrons, through a chain of haem cofactors to the FAD cofactor, which deprotonates a base, probably water.
0.05 Step 1
GIF of Reaction Step M0131.stg01

In a proton transfer chain involving His72-water-water-Tyr385-Tyr201 water deprotonates the 4-hydroxybenzoate substrate.
Step 2
GIF of Reaction Step M0020.stg02

FAD eliminates a hydride ion, which adds to fumarate with concomitant double bond rearrangement, the terminal carboxylate deprotonates His504.
0.2 Step 2
GIF of Reaction Step M0131.stg02

A conformational change allows NADP to bind, which initiates a reverse of the first proton transfer and a hydride transfer from NADP to the FAD cofactor.
Step 3
GIF of Reaction Step M0020.stg03

His504 deprotonates the newly formed hydroxyl group with concomitant deprotonation of Arg402, across the C=C, which initiates a proton relay chain through Glu378 and Arg381 to bulk solvent.
0.03 Step 3
GIF of Reaction Step M0131.stg03

FAD undergoes a double bond rearrangement that results in the single electron transfer from FAD to dioxygen.
Step 4
No Step with this number present
N/A Step 4
GIF of Reaction Step M0131.stg04

The FAD and dioxygen radical species undergo a colligation reaction to form the FAD-peroxo adduct.
Step 5
No Step with this number present
N/A Step 5
GIF of Reaction Step M0131.stg05

The FAD-peroxo adduct deprotonates a water molecule.
Step 6
No Step with this number present
N/A Step 6
GIF of Reaction Step M0131.stg06

In a proton transfer chain involving His72-water-water-Tyr385-Tyr201 water deprotonates the 4-hydroxybenzoate substrate. The substrate undergoes a double bond rearrangement that results in the ortho-position attacking the FAD-peroxo adduct in a nucleophilic substitution that cleaves the O-O bond.
Step 7
No Step with this number present
N/A Step 7
GIF of Reaction Step M0131.stg07

The FAD intermediate deprotonates the hydorxylated aromatic intermediate, cleaving the C-H bond and initiating a double bond rearrangement to yield 3,4-dihydroxybenzoic acid. This then takes a proton from water through the His72-water-water-Tyr385-Tyr201 proton transfer chain.
Step 8
No Step with this number present
N/A Step 8
GIF of Reaction Step M0131.stg08

Water deprotonates the 3,4-dihydroxybenzoic acid through the His72-water-water-Tyr385-Tyr201 proton transfer chain.
Step 9
No Step with this number present
N/A Step 9
GIF of Reaction Step M0131.stg09

The FAD-bound hydroxyl group initiates an intramolecular elimination of water, regenerating the FAD cofactor.

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