5.1.1.4: proline racemase
This is an abbreviated version!
For detailed information about proline racemase, go to the full flat file.
Word Map on EC 5.1.1.4
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5.1.1.4
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trypanosoma
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cruzi
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d-proline
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chagas
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oversaturated
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diaminopimelate
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2-epimerase
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pyrrole-2-carboxylic
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stickland
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medicine
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abeles
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trypanosomosis
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stereoinversion
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pracs
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lumazine
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drug development
- 5.1.1.4
- trypanosoma
- cruzi
- d-proline
- chagas
-
oversaturated
- diaminopimelate
-
2-epimerase
-
pyrrole-2-carboxylic
-
stickland
- medicine
-
abeles
-
trypanosomosis
-
stereoinversion
-
pracs
- lumazine
- drug development
Reaction
Synonyms
CdPRAC, CdProR, FaProR, HjProR, PA45-A, PA45-B, PRAC, PRAC1, PrdF, proline racemase, proline racemase A, proline racemase B, proline racemase/hydroxyproline epimerase, ProR, ProR/HypE, Racemase, proline, TcPA45, TcPRAC, TcPRACA, TcPRACB, Tgr.146.1080, TryPRAC, TvHYP1, TvPRAC
ECTree
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Natural Substrates Products on EC 5.1.1.4 - proline racemase
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REACTION DIAGRAM
L-Pro
D-Pro
overexpression of TcPRAC leads to an increase in parasite differentiation into infective forms and its subsequent penetration into host cells. During infection of its mammalian host, the parasite secretes a proline racemase that contributes to parasite immune evasion by acting as a B-cell mitogen
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L-proline
D-proline
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the simplest mechanism for ProR isomerization of L-Pro to D-Pro entails the Cys130/Cys300 dyad in the thiolate/thiol forms, respectively, while His132 and Asp296 are in their neutral and carboxylate forms, in this scheme Cys130 is deprotonated either by a water molecule or an initially neutral form of the amine moiety of the substrate, thus, His132 and Asp296 do not serve a catalytic acid-base role in the racemization step but interact tightly with the ammonium moiety of the substrate, the ProR catalytic cycle involves 2 proton-transfer reactions in either direction of the racemization
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a free and intact active site of the enzyme is necessary to allow mitogenicity
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additional information
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a free and intact active site of the enzyme is necessary to allow mitogenicity
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