SGID Silkworm Genome Informatics Database
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
EC Number
1.11.1.15
EMBL
BABH01016932    BABH01016933    BABH01016934    BABH01016935    EU128675    ABV32570.1    + More
DQ311144    ABD36089.1    AGBW02013269    OWR43730.1    GAIX01013874    JAA78686.1    ODYU01009260    SOQ53554.1    NWSH01003565    PCG66101.1    KQ461108    KPJ09001.1    MF979110    AWA45973.1    KC996761    AGT62471.1    GANO01002097    JAB57774.1    GEZM01015464    GEZM01015463    JAV91629.1    GFDF01000554    JAV13530.1    KQ971342    EFA04630.1    AXCM01003872    AAAB01008807    EAA04146.2    APCN01003711    AXCN02000440    GECZ01014184    JAS55585.1    GGFJ01008999    MBW58140.1    GDAI01000446    JAI17157.1    GGFJ01009001    MBW58142.1    GAMC01004291    JAC02265.1    CVRI01000070    CRL07210.1    DQ215156    DQ215157    DQ215159    EF191678    EF191685    ACH44882.1    MUZQ01000049    OWK60910.1    GALX01001261    JAB67205.1    GAMD01001371    JAB00220.1    ATLV01021970    KE525326    KFB47024.1    GEDC01031019    JAS06279.1    GEBQ01025664    JAT14313.1    GBYB01011519    JAG81286.1    ADMH02001540    ETN62128.1    AGTO01020768    GGFK01012045    MBW45366.1    UFQT01000285    SSX22800.1    UFQT01000393    SSX23923.1    DQ215158    ACH44884.1    QRBI01000117    RMC08302.1    GGFK01012002    MBW45323.1    GDHF01022792    GDHF01006648    JAI29522.1    JAI45666.1    KK107063    QOIP01000005    EZA61154.1    RLU22577.1    GAKP01010341    JAC48611.1    GBXI01015635    GBXI01012416    JAC98656.1    JAD01876.1    IAAA01001924    LAA03316.1    KF745893    KF745894    KZ288285    AHL44194.1    AIR96016.1    PBC29460.1    GL451770    EFN78585.1    APGK01045856    KB741039    KB632188    ENN74546.1    ERL89793.1    BT127464    AEE62426.1    KY204028    AQW41375.1    DS235093    EEB11859.1    AKCR02000021    PKK27212.1    JX052789    AFK11017.1    JQ364950    AFD04441.1    MF467270    AUR53651.1    GECU01035475    GECU01034886    JAS72231.1    JAS72820.1    AMGL01022133    MCFN01000500    OXB57991.1    AWGT02000005    OXB84226.1    JH880647    ELR59937.1    KC342239    AGH70289.1    MKHE01000014    OWK08382.1    AF080228    AF090194    AJ243848    BT020967    BC102172    JX208657    AFM86971.1    AADN05000934    PPHD01002801    POI33850.1    AAEX03005208    ADTU01015424    JX209226    AFM87540.1    AANG04002195    KQ976574    KYM80096.1    AEYP01054466    AEYP01054467    LSYS01005497    OPJ77131.1    AJ720480    NOWV01000038    RDD43480.1    DS985242    EDV27570.1   
Pfam
PF10417   1-cysPrx_C        + More
PF00578   AhpC-TSA
Interpro
IPR036249   Thioredoxin-like_sf        + More
IPR024706   Peroxiredoxin_AhpC-typ       
IPR000866   AhpC/TSA       
IPR019479   Peroxiredoxin_C       
IPR013766   Thioredoxin_domain       
SUPFAM
SSF52833   SSF52833       
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.
Length:
223
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
outside
1  -  223
 
 

Population Genetic Test Statistics

Pi
13.93521
Theta
16.214054
Tajima's D
-0.942041
CLR
0.304731
CSRT
0.145342732863357
Interpretation
Uncertain
Peptides ×
Source Sequence Identity Evalue
25044914 TFNQVEIKPEMIGHYIGEFSVTYKPVK 95.65 2e-10
26822097 TCFPQGVNVVPIPSGK 100.00 3e-09
26280517 SETSGKFEDIIIAIITPIPK 100.00 3e-09
25044914 SEVVIVSVKPDVVVPAIK 100.00 3e-09
27102218 AGDDCMVIPTVPEDQIK 100.00 3e-09
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