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Flavoprotein Edit Wikipedia article
|the fmn binding protein athal3|
Flavoproteins are involved in a wide array of biological processes, including, but by no means limited to, bioluminescence, removal of radicals contributing to oxidative stress, photosynthesis, DNA repair, and apoptosis. The spectroscopic properties of the flavin cofactor make it a natural reporter for changes occurring within the active site; this makes flavoproteins one of the most-studied enzyme families.
The first mention of a flavoprotein in the scientific literature dates back to 1879, when the work on the composition of cow’s milk resulted in the isolation of a bright-yellow pigment, that we now know as flavin, but termed lactochrome at the time. By the early 1930s, this same pigment had been isolated from a range of sources, and recognised as a component of the vitamin B complex. Its structure was determined almost simultaneously by two groups in 1934, and given the name riboflavin, derived from the ribityl side chain and yellow colour of the conjugated ring system.
The first evidence for the requirement of flavin as an enzyme cofactor came in 1935. Hugo Theorell and coworkers showed that a bright-yellow-coloured yeast protein, identified previously as essential for cellular respiration, could be separated into apoprotein and a bright-yellow pigment. Neither apoprotein nor pigment alone could catalyse the oxidation of NADH, but mixing of the two restored the enzyme activity. However, replacing the isolated pigment with riboflavin did not restore enzyme activity, despite their being indistinguishable under spectroscopy. This led to the discovery that the protein studied required not riboflavin but flavin mononucleotide to be catalytically active
The flavoprotein family contains a diverse range of enzymes, including:
- Epidermin biosynthesis protein, EpiD, which has been shown to be a flavoprotein that binds FMN. This enzyme catalyses the removal of two reducing equivalents from the cysteine residue of the C-terminal meso-lanthionine of epidermin to form a --C==C-- double bond.
- The B chain of dipicolinate synthase, an enzyme which catalyses the formation of dipicolinic acid from dihydroxydipicolinic acid.
- Phenylacrylic acid decarboxylase EC 4.1.1.-, and enzyme which confers resistance to cinnamic acid in yeast
 See also
- Massey, V. (2000) The chemical and biological versatility of riboflavin, Biochem. Soc. Trans. 28, 283-296.
- Theorell, H. (1935) Preparation in pure state of the effect group of yellow enzymes, Biochemische Zeitschrift 275, 344-346.
- Warburg, O., and Christian, W. (1938) Isolation of the prosthetic group of the amino acid oxydase, Biochemische Zeitschrift 298, 150-168.
- Christie, S. M. H., Kenner, G. W., and Todd, A. R. (1954) NUCLEOTIDES .25. A SYNTHESIS OF FLAVIN ADENINE DINUCLEOTIDE, Journal of the Chemical Society, 46-52.
- Kupke T, Stevanovic S, Sahl HG, Gotz F (August 1992). "Purification and characterization of EpiD, a flavoprotein involved in the biosynthesis of the lantibiotic epidermin". J. Bacteriol. 174 (16): 5354–61. PMC 206373. PMID 1644762. //www.ncbi.nlm.nih.gov/pmc/articles/PMC206373/.
- Daniel RA, Errington J (July 1993). "Cloning, DNA sequence, functional analysis and transcriptional regulation of the genes encoding dipicolinic acid synthetase required for sporulation in Bacillus subtilis". J. Mol. Biol. 232 (2): 468–83. doi:10.1006/jmbi.1993.1403. PMID 8345520.
- Clausen M, Lamb CJ, Megnet R, Doerner PW (May 1994). "PAD1 encodes phenylacrylic acid decarboxylase which confers resistance to cinnamic acid in Saccharomyces cerevisiae". Gene 142 (1): 107–12. doi:10.1016/0378-1119(94)90363-8. PMID 8181743.
- Flavoprotein at eMedicine Dictionary
- The menu "science" of the program STRAP provides A comprehensive collection of all flavo-proteins with known 3D-structure. It compares the protein structures to elucidate phylogenetic relationships.
This tab holds the annotation information that is stored in the Pfam database. As we move to using Wikipedia as our main source of annotation, the contents of this tab will be gradually replaced by the Wikipedia tab.
Flavoprotein Provide feedback
This family contains diverse flavoprotein enzymes. This family includes epidermin biosynthesis protein, EpiD P30197 which has been shown to be a flavoprotein that binds FMN . This enzyme catalyses the removal of two reducing equivalents from the cysteine residue of the C-terminal meso-lanthionine of epidermin to form a --C==C-- double bond. This family also includes the B chain of dipicolinate synthase a small polar molecule that accumulates to high concentrations in bacterial endospores, and is thought to play a role in spore heat resistance, or the maintenance of heat resistance . dipicolinate synthase catalyses the formation of dipicolinic acid from dihydroxydipicolinic acid. This family also includes phenyl-acrylic acid decarboxylase P33751 ( EC:4.1.1.-) .
Kupke T, Stevanovic S, Sahl HG, Gotz F; , J Bacteriol 1992;174:5354-5361.: Purification and characterization of EpiD, a flavoprotein involved in the biosynthesis of the lantibiotic epidermin. PUBMED:1644762 EPMC:1644762
Daniel RA, Errington J; , J Mol Biol 1993;232:468-483.: Cloning, DNA sequence, functional analysis and transcriptional regulation of the genes encoding dipicolinic acid synthetase required for sporulation in Bacillus subtilis. PUBMED:8345520 EPMC:8345520
Clausen M, Lamb CJ, Megnet R, Doerner PW; , Gene 1994;142:107-112.: PAD1 encodes phenylacrylic acid decarboxylase which confers resistance to cinnamic acid in Saccharomyces cerevisiae. PUBMED:8181743 EPMC:8181743
External database links
This tab holds annotation information from the InterPro database.
InterPro entry IPR003382This entry contains a diverse range of flavoprotein enzymes, including epidermin biosynthesis protein, EpiD, which has been shown to be a flavoprotein that binds FMN [PUBMED:1644762]. This enzyme catalyzes the removal of two reducing equivalents from the cysteine residue of the C-terminal meso-lanthionine of epidermin to form a --C==C-- double bond. This family also includes the B chain of dipicolinate synthase a small polar molecule that accumulates to high concentrations in bacterial endospores, and is thought to play a role in spore heat resistance, or the maintenance of heat resistance [PUBMED:8345520]. Dipicolinate synthase catalyses the formation of dipicolinic acid from dihydroxydipicolinic acid. This family also includes phenylacrylic acid decarboxylase EC [PUBMED:8181743].
The mapping between Pfam and Gene Ontology is provided by InterPro. If you use this data please cite InterPro.
|Molecular function||catalytic activity (GO:0003824)|
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|Seed source:||Pfam-B_1622 (release 5.4)|
|Number in seed:||143|
|Number in full:||8070|
|Average length of the domain:||130.60 aa|
|Average identity of full alignment:||29 %|
|Average coverage of the sequence by the domain:||43.39 %|
|HMM build commands:||
build method: hmmbuild -o /dev/null HMM SEED
search method: hmmsearch -Z 23193494 -E 1000 --cpu 4 HMM pfamseq
|Family (HMM) version:||14|
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There is 1 interaction for this family. More...
We determine these interactions using iPfam, which considers the interactions between residues in three-dimensional protein structures and maps those interactions back to Pfam families. You can find more information about the iPfam algorithm in the journal article that accompanies the website.
For those sequences which have a structure in the Protein DataBank, we use the mapping between UniProt, PDB and Pfam coordinate systems from the PDBe group, to allow us to map Pfam domains onto UniProt sequences and three-dimensional protein structures. The table below shows the structures on which the Flavoprotein domain has been found. There are 49 instances of this domain found in the PDB. Note that there may be multiple copies of the domain in a single PDB structure, since many structures contain multiple copies of the same protein seqence.
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