UFM1 | |||||||||||||||||||||||||||||||||||||||||||||||||||
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Aliases | UFM1 , BM-002, C13orf20, ubiquitin-fold modifier 1, ubiquitin fold modifier 1, HLD14 | ||||||||||||||||||||||||||||||||||||||||||||||||||
External IDs | OMIM: 610553 MGI: 1915140 HomoloGene: 9594 GeneCards: UFM1 | ||||||||||||||||||||||||||||||||||||||||||||||||||
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Ubiquitin-fold modifier 1, also known as UFM1, is a protein which in humans is encoded by the UFM1 gene. [5] [6]
UFM1 is a ubiquitin-like protein that is conjugated to target proteins by E1-like activating enzyme UBA5 and E2-like conjugating enzyme UFC1. [6] This process is often referred to as UFMylation. [7]
UFM1 shares several common properties with ubiquitin (Ub) and the other ubiquitin-like proteins (UBLs). Ufm1 has similar tertiary structure to Ub but lacks any obvious sequence similarity. It is synthesized as an inactive precursor form (pro-Ufm1) which has 2 additional amino acids beyond the conserved glycine. The mechanism of Ufm1 conjugation is similar to that of ubiquitin. Mature Ufm1 has an exposed C-terminal glycine which is essential for subsequent activation by its cognate E1 protein (Uba5). This activation step results in the formation of a high-energy thiolester bond in the presence of ATP. The Ufm1 is subsequently transferred to its cognate E2-like enzyme (Ufc1) via a similar thioester linkage with a cysteine at the E2 active site. Ufm1 is conjugated to a variety of target proteins and forms complexes with as yet unidentified proteins. Thus, presumably there exist E3 ligases (none have been identified to date) to perform the final step in Ufm1 conjugation to relevant targets. The modification of proteins with Ufm1 is also reversible. Two novel cysteine proteases have been identified to date (UFSP1 and UFSP2) which cleave Ufm1-peptide C-terminal fusions and also removes Ufm1 from native intracellular conjugates. These proteases have no obvious homology to ubiquitin deconjugating enzymes. The proteins for Ufm1 conjugation (Uba5, Ufc1 and Ufm1) are all conserved in animals and plants (but not yeast) suggesting important roles in multicellular organisms. The exact role of Ufm1 modification in vivo is not yet known, [8] but the primary target appear to be uL24/RPL26 in human cells. [7]
Ubiquitin-like modifier activating enzyme 1 (UBA1) is an enzyme which in humans is encoded by the UBA1 gene. UBA1 participates in ubiquitination and the NEDD8 pathway for protein folding and degradation, among many other biological processes. This protein has been linked to X-linked spinal muscular atrophy type 2, neurodegenerative diseases, and cancers.
NEDD8-activating enzyme E1 catalytic subunit is a protein that in humans is encoded by the UBA3 gene.
Ubiquitin-conjugating enzyme E2 E3 is a protein that in humans is encoded by the UBE2E3 gene.
Ubiquitin-conjugating enzyme E2 B is a protein that in humans is encoded by the UBE2B gene.
Ubiquitin-conjugating enzyme E2 C is a protein that in humans is encoded by the UBE2C gene.
Ubiquitin conjugation factor E4 B is a protein that in humans is encoded by the UBE4B gene.
Ubiquitin-like modifier-activating enzyme 6 is a protein that in humans is encoded by the UBA6 gene.
Ubiquitin-conjugating enzyme E2 G1 is a protein that in humans is encoded by the UBE2G1 gene.
Ubiquitin-conjugating enzyme E2 H is a protein that in humans is encoded by the UBE2H gene.
Autophagy related 12 is a protein that in humans is encoded by the ATG12 gene.
Ubiquitin-like modifier-activating enzyme 7 is a protein that in humans is encoded by the UBA7 gene.
Ubiquitin-like modifier-activating enzyme 5 is a protein that in humans is encoded by the UBA5 gene.
Ubiquitin-conjugating enzyme E2 J1 is a protein that in humans is encoded by the UBE2J1 gene.
NEDD8-conjugating enzyme Ubc12 is a protein that in humans is encoded by the UBE2M gene.
Ubiquitin conjugation factor E4 A is a protein that in humans is encoded by the UBE4A gene.
Sentrin-specific protease 8 is an enzyme that in humans is encoded by the SENP8 gene.
Ubiquitin-conjugating enzyme E2 R2 is a protein that in humans is encoded by the UBE2R2 gene.
Ubiquitin conjugating enzyme E2 Z (UBE2Z), also known as UBA6-specific E2 enzyme 1 (USE1), is an enzyme that in humans is encoded by the UBE2Z gene on chromosome 17. It is ubiquitously expressed in many tissues and cell types. UBE2Z is an E2 ubiquitin conjugating enzyme and participates in the second step of protein ubiquitination during proteolysis. A genome-wide association study (GWAS) revealed the UBE2Z gene to be associated with chronic kidney disease. The UBE2Z gene also contains one of 27 SNPs associated with increased risk of coronary artery disease.
Ubiquitin-like proteins (UBLs) are a family of small proteins involved in post-translational modification of other proteins in a cell, usually with a regulatory function. The UBL protein family derives its name from the first member of the class to be discovered, ubiquitin (Ub), best known for its role in regulating protein degradation through covalent modification of other proteins. Following the discovery of ubiquitin, many additional evolutionarily related members of the group were described, involving parallel regulatory processes and similar chemistry. UBLs are involved in a widely varying array of cellular functions including autophagy, protein trafficking, inflammation and immune responses, transcription, DNA repair, RNA splicing, and cellular differentiation.
Ubiquitin-fold modifier conjugating enzyme 1 is a protein that in humans is encoded by the UFC1 gene.