IAA4 — Pisum sativum

Summary

PSAT6G158720 (IAA4) on garden pea chromosome 6LG2 encodes an AUX/IAA family protein containing AUX_IAA and PB1-like domains. It is associated with auxin response, auxin signalling, photomorphogenesis, geotropism, root development, DNA-dependent transcription, mRNA stabilisation, and protein synthesis. The gene is linked to pathways including TIR1-IAA-AUX/IAA interaction, ARF inactivation by AUX/IAA, ubiquitination and degradation of AUX/IAA, and broader processes of seed development, regulation of seed size, reproductive structure development, and hormone signalling, transport and metabolism. Studies of related AUX/IAA genes in other species connect the family to auxin-mediated growth and developmental regulation.