Gene
KWMTBOMO00487  Validated by peptides from experiments
Pre Gene Modal
BGIBMGA012304
Annotation
1-Cys_peroxiredoxin_[Bombyx_mori]
Full name
Peroxiredoxin-6
Alternative Name
1-Cys peroxiredoxin
Acidic calcium-independent phospholipase A2
Antioxidant protein 2
Ciliary body glutathione peroxidase
Non-selenium glutathione peroxidase
PHGPx
Location in the cell
Cytoplasmic   Reliability : 2.106
Sequence
CDS
ATGCTTTTACTTGGAAAAACTTTTCCAGACTTCTCTGCCAACACAACAGAAGGCGAAATAAATTTTCACGAGTGGCTAGGAGATAAGTGGGGTATACTGTTCTCTCACCCATCAGACTTCACCCCGGTCTGCACAACAGAATTGGCTCGGGTGCTCGTCCTTCTTCCAGAGTTTGTGAAGCGCAACACAAAAGTCATTGGCCTGTCCTGTGACAGTGTATCCTCTCACTTGGAATGGTGCAAGGACATTAAGTCTTTTGCTGGTTGCAATGAAGACGAACCATTTCCTTATCCGATAATTGAAGACGAGAAGAGAGAGTTGGCCAACAAGCTCGGCATGATTGACAATGACGAATTGGATCACAAAGGAATGCCGCTGACAGCCCGTGCAGTCTTCATTGTCGATCCGAATAAGAAGTTTAGACTGTCAATATTGTATCCGGCTACGACTGGACGTAATTTTGATGAGATTCTGCGCATACTGGACTCTCTCCAGTTGACTGATAAGGCTAAAGTGGCAACGCCGGTAGATTGGAAGGCGGGTGACGACTGCATGGTGTTGCCAACCGTGCCGGAGGACCAGATCAAAACGTGTTTCCCACAGGGTGTCAACGTTGTTCCGCTTCCGTCCGGCAAGAATTATCTGAGGAAGACTGCTTGCCCTAAAATTTGA
Protein
MLLLGKTFPDFSANTTEGEINFHEWLGDKWGILFSHPSDFTPVCTTELARVLVLLPEFVKRNTKVIGLSCDSVSSHLEWCKDIKSFAGCNEDEPFPYPIIEDEKRELANKLGMIDNDELDHKGMPLTARAVFIVDPNKKFRLSILYPATTGRNFDEILRILDSLQLTDKAKVATPVDWKAGDDCMVLPTVPEDQIKTCFPQGVNVVPLPSGKNYLRKTACPKI
Summary
Description
Thiol-specific peroxidase that catalyzes the reduction of hydrogen peroxide and organic hydroperoxides to water and alcohols, respectively. Can reduce H(2)O(2) and short chain organic, fatty acid, and phospholipid hydroperoxides. Also has phospholipase activity, and can therefore either reduce the oxidized sn-2 fatty acyl grup of phospholipids (peroxidase activity) or hydrolyze the sn-2 ester bond of phospholipids (phospholipase activity). These activities are dependent on binding to phospholipids at acidic pH and to oxidized phospholipds at cytosolic pH. Plays a role in cell protection against oxidative stress by detoxifying peroxides and in phospholipid homeostasis.
Catalytic Activity
[protein]-dithiol + a hydroperoxide = [protein]-disulfide + an alcohol + H2O
a 1,2-diacyl-sn-glycero-3-phosphocholine + H2O = a 1-acyl-sn-glycero-3-phosphocholine + a fatty acid + H(+)
Biophysicochemical Properties
25 uM for H(2)O(2)
180 uM for H(2)O(2)
22 uM for tert-butyl hydroperoxide
142 uM for tert-butyl hydroperoxide
170 uM for cumene hydroperoxide
120 uM for cumene hydroperoxide
12 uM for triphenylcarbinyl hydroperoxide
34 uM for linoleic hydroperoxide
141 uM for linolenoyl hydroperoxide
135 uM for arachidonoyl hydroperoxide
120 uM for PLCP hydroperoxide
129 uM for PACP hydroperoxide
22 uM for 5-phenyl-3-pentenyl hydroperoxide
350 uM for dipalmitoyl phosphatidylcholine (at pH 4)
Subunit
Homodimer (By similarity). Interacts with GSTP1; mediates PRDX6 glutathionylation and regeneration (PubMed:15004285). Interacts with APEX1. Interacts with STH. May interact with FAM168B (By similarity). May interact with HTR2A (By similarity).
Homodimer (By similarity). Interacts with GSTP1; mediates PRDX6 glutathionylation and regeneration (By similarity).
Miscellaneous
The active site is a conserved redox-active cysteine residue, the peroxidatic cysteine (C(P)), which makes the nucleophilic attack on the peroxide substrate. The peroxide oxidizes the C(P)-SH to cysteine sulfenic acid (C(P)-SOH), which then reacts with another cysteine residue, the resolving cysteine (C(R)), to form a disulfide bridge. The disulfide is subsequently reduced by an appropriate electron donor to complete the catalytic cycle. In this 1-Cys peroxiredoxin, no C(R) is present and C(P) instead forms a disulfide with a cysteine from another protein or with a small thiol molecule. C(P) is reactivated by glutathionylation mediated by glutathione S-transferase Pi, followed by spontaneous reduction of the enzyme with glutathione.
Similarity
Belongs to the peroxiredoxin family. Prx6 subfamily.
Keywords
Acetylation
Antioxidant
Complete proteome
Cytoplasm
Direct protein sequencing
Hydrolase
Lipid degradation
Lipid metabolism
Lysosome
Multifunctional enzyme
Oxidoreductase
Peroxidase
Phosphoprotein
Redox-active center
Reference proteome
Feature
chain Peroxiredoxin-6
PDB
1PRX
E-value=1.47921e-75,
Score=716
Ontologies
Topology
Subcellular location
Cytoplasm
Also found in lung secretory organelles (lamellar bodies). With evidence from 8 publications.
Lysosome
Also found in lung secretory organelles (lamellar bodies). With evidence from 8 publications.
Number of predicted TMHs:
0
Exp number of AAs in TMHs:
0.00782
Exp number, first 60 AAs:
0.00782
Total prob of N-in:
0.00955
Population Genetic Test Statistics