Table 1.

Molecules identified as playing a critical role in [Fe-S] cluster biogenesis


Protein

Function
NiFS  Azotobacter vinlandii cysteine desulfurase that liberates sulphur from cysteine for [Fe-S] cluster biosynthesis.26  
Nfs1   Human homolog of NiFS; 2 forms: isoform a (cytosolic) and isoform b (mitochondrial). 
NiFU   Bacterial scaffold protein that provides foundation for the assembly of [2Fe-2S] and [4Fe-4S] clusters.28  
IscU  E coli NiFU homolog: scaffold protein involved in [4Fe-4S] cluster assembly.28  
Isu1, Isu2   In yeast, IsU function is encompassed by Isu1 and Isu2.29  
Nfu1p   In yeast, Nfu1p functions in [Fe-S] cluster assembly in Isu1/2 or its insertion into an appropriate apoprotein.30,31  
IscU1, IscU2
 
Human homologs of IscU; 2 forms: IscU1 (cytosolic) and IscU2 (mitochondrial). Both are scaffold proteins involved in [Fe-S] cluster assembly/disassembly.32 
 

Protein

Function
NiFS  Azotobacter vinlandii cysteine desulfurase that liberates sulphur from cysteine for [Fe-S] cluster biosynthesis.26  
Nfs1   Human homolog of NiFS; 2 forms: isoform a (cytosolic) and isoform b (mitochondrial). 
NiFU   Bacterial scaffold protein that provides foundation for the assembly of [2Fe-2S] and [4Fe-4S] clusters.28  
IscU  E coli NiFU homolog: scaffold protein involved in [4Fe-4S] cluster assembly.28  
Isu1, Isu2   In yeast, IsU function is encompassed by Isu1 and Isu2.29  
Nfu1p   In yeast, Nfu1p functions in [Fe-S] cluster assembly in Isu1/2 or its insertion into an appropriate apoprotein.30,31  
IscU1, IscU2
 
Human homologs of IscU; 2 forms: IscU1 (cytosolic) and IscU2 (mitochondrial). Both are scaffold proteins involved in [Fe-S] cluster assembly/disassembly.32 
 

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