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Domain

The first 10 amino acids are essential for nuclear localization.

Function

Catalyzes the rate-limiting step of the non-oxidative phase in the pentose phosphate pathway. Catalyzes the reversible conversion of sedheptulose-7-phosphate and D-glyceraldehyde 3-phosphate into erythrose-4-phosphate and beta-D-fructose 6-phosphate (PubMed:18687684, PubMed:8955144). Not only acts as a pentose phosphate pathway enzyme, but also affects other metabolite pathways by altering its subcellular localization between the nucleus and the cytoplasm (By similarity).

Involvement in disease

Transaldolase deficiency

TALDOD

An inborn error of the pentose phosphate pathway resulting in early-onset multisystem disease. Clinical features include growth retardation, dysmorphic features, cutis laxa, congenital heart disease, hepatosplenomegaly, telangiectases of the skin, pancytopenia, and bleeding tendency.

None

The disease is caused by variants affecting the gene represented in this entry.

Pathway

Carbohydrate degradation; pentose phosphate pathway; D-glyceraldehyde 3-phosphate and beta-D-fructose 6-phosphate from D-ribose 5-phosphate and D-xylulose 5-phosphate (non-oxidative stage): step 2/3.

Sequence similarities

Belongs to the transaldolase family. Type 1 subfamily.

Cellular localization

  • Isoform 1
  • Nucleus
  • Cytoplasm
  • Shuttles between the nucleus and the cytoplasm. Actively transported into the nucleus in an importin alpha/beta-dependent manner. Exported into the cytoplasm by CRM1.
  • Isoform 2
  • Cytoplasm
  • Imported into the nucleus when incorporated in isoform 1/isoform 2 homodimer.

Alternative names

TAL, TALDO, TALDOR, TALDO1, Transaldolase

Target type

Proteins

Primary research area

Metabolism

Molecular weight

37540Da