Tbio MSRB1 Methionine-R-sulfoxide reductase B1

Protein Summary

Description

Methionine-sulfoxide reductase that specifically reduces methionine (R)-sulfoxide back to methionine. While in many cases, methionine oxidation is the result of random oxidation following oxidative stress, methionine oxidation is also a post-translational modification that takes place on specific residue. Acts as a regulator of actin assembly by reducing methionine (R)-sulfoxide mediated by MICALs (MICAL1, MICAL2 or MICAL3) on actin, thereby promoting filament repolymerization. Plays a role in innate immunity by reducing oxidized actin, leading to actin repolymerization in macrophages. The protein encoded by this gene belongs to the methionine-R-sulfoxide reductase B (MsrB) family. Members of this family function as repair enzymes that protect proteins from oxidative stress by catalyzing the reduction of methionine-R-sulfoxides to methionines. This protein is highly expressed in liver and kidney, and is localized to the nucleus and cytosol. It is the only member of the MsrB family that is a selenoprotein, containing a selenocysteine (Sec) residue at its active site. It also has the highest methionine-R-sulfoxide reductase activity compared to other members containing cysteine in place of Sec. Sec is encoded by the UGA codon, which normally signals translation termination. The 3' UTRs of selenoprotein mRNAs contain a conserved stem-loop structure, designated the Sec insertion sequence (SECIS) element, that is necessary for the recognition of UGA as a Sec codon, rather than as a stop signal. A pseudogene of this locus has been identified on chromosome 19. [provided by RefSeq, Aug 2017]

Uniprot Accession IDs

• Q9NZV6
• Q96RX6
• Q9BTV2
• Q9P0B1
• MsrB1

Gene Name

• MSRB1

Ensembl ID

• ENST00000361871
• ENSP00000355084
• ENSG00000198736

Symbol

• SEPX1
• SELR
• SELX
• SepR
• SEPX1
• HSPC270

Knowledge Table

Most Knowledge About	Knowledge Value (0 to 1 scale)
transcription factor perturbation	0.84
histone modification site profile	0.79
kinase perturbation	0.66
gene perturbation	0.59
tissue sample	0.59

Protein Classes

No PANTHER Classes or DTO Classes found

IDG Development Level Summary

Tdark

These are targets about which virtually nothing is known. They do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 99.01   (req: < 5)

Gene RIFs: 13   (req: <= 3)

Antibodies: 108   (req: <= 50)

Tbio

These targets do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 99.01   (req: >= 5)

Gene RIFs: 13   (req: > 3)

Antibodies: 108   (req: > 50)

- OR - satisfy the following criterion:

Gene Ontology Terms: 9

Tchem

Target has at least one ChEMBL compound with an activity cutoff of < 30 nM - AND - satisfies the preceding conditions

Active Ligand: 0

Tclin

Target has at least one approved drug - AND - satisfies the preceding conditions

Active Drug: 0