SUM1 (PHAVU_008G129000) — Phaseolus vulgaris

Summary

PvSUM1 (PHAVU_008G129000) on chromosome 8 of French bean encodes a protein containing a Rad60/SUMO-like domain and a ubiquitin-like domain, placing it in the SUMO (small ubiquitin-like modifier) family. The gene product is associated with deubiquitinase activator activity and a wide array of other molecular functions including malate synthase, aminomethyltransferase, and fucosidase activities. PvSUM1 is linked to diverse biological processes such as protein secretion by the type III secretion system, negative regulation of ubiquitin-dependent protein catabolism, cellular responses to metal and gamma radiation, plant epidermis morphogenesis, and flower structural organization. It localizes to multiple cellular compartments including the AP-type membrane coat adaptor complex, cohesin complex, plastid thylakoid membrane, and photosystem I reaction center. The gene is associated with agronomically relevant traits including starch grain size, germinability at low temperature, drought stress response, nematode resistance, seed set percent, leaf trichome density, and shoot elongation under submergence.