Gene Details:

• Gene ID: Pbr032130.1
• Gene Symbol: PbTST4
• Gene Name: tonoplast membrane sugar transporter
• Genome:
• Species: Pyrus bretschneideri

Functional Descriptions:

• Furthermore, PbCPK28 interacts with and phosphorylates PbTST4, a proton antiporter, thereby coupling the sugar import into the vacuole with proton export.
• We demonstrated that residues S277 and S314 of PbTST4 are crucial for its function.
• Our data demonstrated that PbCPK28 could interact with and phosphorylate the vacuolar sugar transporter PbTST4, as well as vacuolar hydrogen proton pump PbVHA-A1, which could provide proton motive forces for PbTST4 and promote transport of excess sugars into vacuoles for storage, eventually increasing sugar accumulation during pear fruit development.
• Together, our work identifies an agriculturally important natural variation and an important regulatory network, allowing genetic improvement of fruit sugar contents in pears through modulation of PbCPK28 expression and phosphorylation of PbTST4 and PbVHA-A1.

Function-related keywords:

• development ,  transporter ,  sugar ,  sugar-transport ,  as-transport

Literature:

• Natural variations in the PbCPK28 promoter regulate sugar content through interaction with PbTST4 and PbVHA-A1 in pear.   DOI:  10.1111/tpj.16126 ;  PMID:  36710644

Related News:

Gene Resources:

• NCBI ID:
• UniProt accessions:

Orthologs:

Sequences:

• CDS Sequence:
• Protein Sequence: