Gene Details:

• Gene ID: Zm00001eb374090
• Gene Symbol: Sh1
• Gene Name: shrunken1
• Genome: Zm-B73-REFERENCE-NAM-5.0
• Species: Zea mays

Functional Descriptions:

• The Sh1 gene is highly expressed in the endosperm and contributes maximum SUS activity in this storage organ.
• Sh1, is highly expressed after 10 DAP, when endosperm filling begins.
• Oen1 was determined to encode Shrunken1 (Sh1), a sucrose synthase (SUS, EC 2.4.1.13). Maize contains three SUS-encoding genes (Sh1, Sus1, and Sus2) with Sh1 contributing predominantly to the endosperm.
• Sus1 and Sus2 promoters had a much stronger O2 transactivation than Sh1, consistent with their transcript reduction in o2 endosperm.
• Although sus1 and sus2 alone or in combination had no perceptible phenotype, either of them could dramatically enhance seed opacity and cavity in Sh1, indicating that transactivation of Sus1 and Sus2 by O2 supplements SUS-mediated endosperm filling in maize.

Function-related keywords:

• seed ,  endosperm ,  sucrose ,  seed-phenotype ,  seed-filling ,  sucrose-synthase

Literature:

• Transactivation of Sus1 and Sus2 by Opaque2 is an essential supplement to sucrose synthase-mediated endosperm filling in maize.   DOI:  10.1111/pbi.13349 ;  PMID:  32004404
• The transcription factors ZmNAC128 and ZmNAC130 coordinate with Opaque2 to promote endosperm filling in maize.   DOI:  10.1093/plcell/koad215 ;  PMID:  37542515
• Protoplast transient expression-based RNA-sequencing: A simple method to screen transcriptional regulation in plants.   DOI:  10.1093/plphys/kiad495 ;  PMID:  37706557

Related News:

• PBJ|巫永睿课题组揭示玉米胚乳灌浆调控新机制

Gene Resources:

• NCBI ID: 542365
• UniProt accessions: K7VDR8 ,  A0A1D6NT56 ,  A0A1D6NT44 ,  A0A1D6NT50

Sequences: