UBQ8_ARATH - PTM Information in dbPTM

Basic Information of Protein

• UniProt ID: UBQ8_ARATH
• UniProt AC: Q39256
• Protein Name: Polyubiquitin 8
• Gene Name: UBQ8
• Organism: Arabidopsis thaliana (Mouse-ear cress).
• Sequence Length: 631
• Subcellular Localization: Cytoplasm. Nucleus.
• Protein Description: Ubiquitin exists either covalently attached to another protein, or free (unanchored). When covalently bound, it is conjugated to target proteins via an isopeptide bond either as a monomer (monoubiquitin), a polymer linked via different Lys residues of the ubiquitin (polyubiquitin chains) or a linear polymer linked via the initiator Met of the ubiquitin (linear polyubiquitin chains). Polyubiquitin chains, when attached to a target protein, have different functions depending on the Lys residue of the ubiquitin that is linked: Lys-11-linked is involved in ERAD (endoplasmic reticulum-associated degradation) and in cell-cycle regulation; Lys-29-linked is involved in lysosomal degradation; Lys-33-linked is involved in kinase modification; Lys-48-linked is involved in protein degradation via the proteasome; Lys-63-linked is involved in endocytosis, and DNA-damage responses. Linear polymer chains formed via attachment by the initiator Met lead to cell signaling. Ubiquitin is usually conjugated to Lys residues of target proteins, however, in rare cases, conjugation to Cys or Ser residues has been observed. When polyubiquitin is free (unanchored-polyubiquitin), it also has distinct roles, such as in activation of protein kinases, and in signaling (By similarity)..
• Protein Sequence: MTIQIYAKTLTEKTITLDVETSDSIHNVKAKIQNKEGIPLDQQRLIFAGKQLEDGLTLADYNIQKESTLHLVLRLRGGMQIFVQTLTGKTITLEVKSSDTIDNVKAKIQDKEGILPRQQRLIFAGKQLEDGRTLADYNIQKESTLHLVLRLCGGMQIFVSTFSGKNFTSDTLTLKVESSDTIENVKAKIQDREGLRPDHQRLIFHGEELFTEDNRTLADYGIRNRSTLCLALRLRGDMYIFVKNLPYNSFTGENFILEVESSDTIDNVKAKLQDKERIPMDLHRLIFAGKPLEGGRTLAHYNIQKGSTLYLVTRFRCGMQIFVKTLTRKRINLEVESWDTIENVKAMVQDKEGIQPQPNLQRLIFLGKELKDGCTLADYSIQKESTLHLVLGMQIFVKLFGGKIITLEVLSSDTIKSVKAKIQDKVGSPPDQQILLFRGGQLQDGRTLGDYNIRNESTLHLFFHIRHGMQIFVKTFSFSGETPTCKTITLEVESSDTIDNVKVKIQHKVGIPLDRQRLIFGGRVLVGSRTLLDYNIQKGSTIHQLFLQRGGMQIFIKTLTGKTIILEVESSDTIANVKEKIQVKEGIKPDQQMLIFFGQQLEDGVTLGDYDIHKKSTLYLVLRLRQRRYDF

Overview of Protein Modification Sites with Functional and Structural Information

Experimental Post-Translational Modification Sites

* ASA = Accessible Surface Area

Locations	Modification	Substrate Peptides & Secondary Structure	ASA (%)	Reference
67	Phosphorylation	DYNIQKESTLHLVLR EEEECCCCEEEEEEE	43.22	25561503
68	Phosphorylation	YNIQKESTLHLVLRL EEECCCCEEEEEEEE	21.20	25561503
143	Phosphorylation	DYNIQKESTLHLVLR HCCCCCHHHHHHHHH	43.22	25561503
144	Phosphorylation	YNIQKESTLHLVLRL CCCCCHHHHHHHHHH	21.20	25561503
264	Phosphorylation	LEVESSDTIDNVKAK EEEECCCCHHHHHHH	31.98	19880383

Upstream regulatory proteins (kinases for phosphorylation sites, E3 ubiquitin ligases of ubiquitination sites, ...)

Oops, there are no upstream regulatory protein records of UBQ8_ARATH !!

Functions of PTM Sites

Oops, there are no descriptions of PTM sites of UBQ8_ARATH !!

Disease-associated PTM Sites based on SAP

* Distance = the distance between SAP position and PTM sites.

Oops, there are no SNP-PTM records of UBQ8_ARATH !!

Protein-Protein Interaction

Oops, there are no PPI records of UBQ8_ARATH !!

Drug and Disease Associations

• Kegg Drug
• DrugBank
• There are no disease associations of PTM sites.