High potential iron-sulfur protein

High potential iron-sulfur protein
Structure of the oxidized high-potential iron-sulfur protein.[1]
Identifiers
Symbol HIPIP
Pfam PF01355
InterPro IPR000170
PROSITE PDOC00515
SCOP 1hpi
OPM family 124
OPM protein 1hpi

High potential iron-sulfur proteins (HIPIP)[2] are a specific class of high-redox potential 4Fe-4S ferredoxins that functions in anaerobic electron transport and which occurs in photosynthetic bacteria and in Paracoccus denitrificans. The HiPIPs are small proteins which show significant variation in their sequences, their sizes (from 63 to 85 amino acids), and in their oxidation- reduction potentials. As shown in the following schematic representation the iron-sulfur cluster is bound by four conserved cysteine residues.

                          [ 4Fe-4S cluster]
                          | |       |     |
       xxxxxxxxxxxxxxxxxxxCxCxxxxxxxCxxxxxCxxxx

'C': conserved cysteine involved in the binding of the iron-sulfur cluster.

References

  1. ^ Benning MM, Meyer TE, Rayment I, Holden HM (March 1994). "Molecular structure of the oxidized high-potential iron-sulfur protein isolated from Ectothiorhodospira vacuolata". Biochemistry 33 (9): 2476–83. doi:10.1021/bi00175a016. PMID 8117708. 
  2. ^ Meyer TE, Breiter DR, Rayment I, Holden HM (1991). "The molecular structure of the high potential iron-sulfur protein isolated from Ectothiorhodospira halophila determined at 2.5-A resolution". J. Biol. Chem. 266 (28): 18660–18667. PMID 1917989. 

External links

Further reading

This article incorporates text from the public domain Pfam and InterPro IPR000170