Skip to main content

Function

Ubiquitin-like protein that can be covalently attached to proteins as a monomer or a lysine-linked polymer. Covalent attachment via an isopeptide bond to its substrates requires prior activation by the E1 complex SAE1-SAE2 and linkage to the E2 enzyme UBE2I, and can be promoted by E3 ligases such as PIAS1-4, RANBP2 or CBX4. This post-translational modification on lysine residues of proteins plays a crucial role in a number of cellular processes such as nuclear transport, DNA replication and repair, mitosis and signal transduction. Involved for instance in targeting RANGAP1 to the nuclear pore complex protein RANBP2. Covalently attached to the voltage-gated potassium channel KCNB1; this modulates the gating characteristics of KCNB1 (PubMed:19223394). Polymeric SUMO1 chains are also susceptible to polyubiquitination which functions as a signal for proteasomal degradation of modified proteins. May also regulate a network of genes involved in palate development. Covalently attached to ZFHX3 (PubMed:24651376).

Involvement in disease

Non-syndromic orofacial cleft 10

OFC10

A birth defect consisting of cleft lips with or without cleft palate. Cleft lips are associated with cleft palate in two-third of cases. A cleft lip can occur on one or both sides and range in severity from a simple notch in the upper lip to a complete opening in the lip extending into the floor of the nostril and involving the upper gum.

None

The disease is caused by variants affecting the gene represented in this entry. A chromosomal aberration involving SUMO1 is the cause of OFC10. Translocation t(2;8)(q33.1;q24.3). The breakpoint occurred in the SUMO1 gene and resulted in haploinsufficiency confirmed by protein assays.

Post-translational modifications

Cleavage of precursor form by SENP1 or SENP2 is necessary for function.

Polymeric SUMO1 chains undergo polyubiquitination by RNF4.

Sequence similarities

Belongs to the ubiquitin family. SUMO subfamily.

Cellular localization

  • Nucleus membrane
  • Nucleus speckle
  • Cytoplasm
  • Nucleus
  • PML body
  • Cell membrane
  • Nucleus
  • Recruited by BCL11A into the nuclear body (By similarity). In the presence of ZFHX3, sequesterd to nuclear body (NB)-like dots in the nucleus some of which overlap or closely associate with PML body (PubMed:24651376).

Alternative names

SMT3C, SMT3H3, UBL1, OK/SW-cl.43, SUMO1, Small ubiquitin-related modifier 1, SUMO-1, GAP-modifying protein 1, SMT3 homolog 3, Sentrin, Ubiquitin-homology domain protein PIC1, Ubiquitin-like protein SMT3C, Ubiquitin-like protein UBL1, GMP1, Smt3C

Target type

Proteins

Primary research area

Oncology

Other research areas

  • Immunology & Infectious Disease

Molecular weight

11557Da

We found 27 products in 3 categories

Assay Kits

Target

Reactive species

Proteins & Peptides

Target

Species of origin