SAP Genomic sequences SAP Phylogeny file SAP Phylogeny file with bootstrap

Minimum number of tobacco SAP genes: 4

Count of tobacco SAP sequences: 6

Pfam accession: STER_AP

SHOULD possess STER_AP domain

A recessive mutation in the Arabidopsis STERILE APETALA (SAP) causes severe aberrations in inflorescence and flower and ovule development. In sap flowers, sepals are carpelloid, petals are short and narrow or absent, and anthers are degenerated. Megasporogenesis, the process of meiotic divisions preceding the female gametophyte formation, is arrested in sap ovules during or just after the first meiotic division. More severe aberrations were observed in double mutants between sap and mutant alleles of the floral homeotic gene APETALA2 (AP2) suggesting that both genes are involved in the initiation of female gametophyte development. Together with the organ identity gene AGAMOUS (AG) SAP is required for the maintenance of floral identity acting in a manner similar to APETALA1. In contrast to the outer two floral organs in sap mutant flowers, normal sepals and petals develop in ag/sap double mutants, indicating that SAP negatively regulates AG expression in the perianth whorls. This supposed cadastral function of SAP is supported by in situ hybridization experiments showing ectopic expression of AG in the sap mutant. We have cloned the SAP gene by transposon tagging and revealed that it encodes a novel protein with sequence motifs, that are also present in plant and animal transcription regulators. Consistent with the mutant phenotype, SAP is expressed in inflorescence and floral meristems, floral organ primordia, and ovules. Taken together, we propose that SAP belongs to a new class of transcription regulators essential for a number of processes in Arabidopsis flower development.

Papers

Byzova, MV; Franken, J; Aarts, MG; de Almeida-Engler, J; Engler, G; Mariani, C; Van Lookeren Campagne, MM; Angenent, GC. Arabidopsis STERILE APETALA, a multifunctional gene regulating inflorescence, flower, and ovule development. Genes Dev. 1999. 13(8):1002-14 PMID: 10215627



Number of contigs: 5

Number of singlets: 1

Number of N terminal – 2

Number of genes with middle part of domain & C terminal – 3

Number of C terminal – 1

Total minimum number – 4




Search sequences and info


Transcription factor sequences
Locus
 Description
 NCBI
SAP_1 [comment=3 prime end] ET045808
ET045807
SAP_2 [comment=5 prime end] ET046385
ET051310
SAP_3 [comment=middle and 3 prime end] ET051533
ET045763
ET049037
ET051532
ET044039
ET046586
ET045393
ET045394
ET048890
ET050575
ET045395
ET044040
ET046587
ET049038
ET044018
SAP_4 [comment=middle and 3 prime end] ET047493
ET046094
ET046095
ET047591
ET047457
ET047590
ET046097
ET042486
ET045710
ET043696
ET046096
ET047456
ET047492
ET049417
ET042064
ET044848
ET049855
SAP_5 [comment=middle and 3 prime end] ET045085
ET045526
ET045779
ET047072
ET049798
ET043076
ET044817
ET045086
ET049565
ET051808
ET049566
ET045537
ET047987
ET041994
ET043077
ET049799
ET041995
ET050358
ET043833
SAP_6 [comment= 5 prime end] ET043353


Tobacco published genes related to transcription factor family SAP
Family Genbank ID Name
Authors of this site:

Paul J Rushton
Marta T. Bokowiec
Xianfeng (Jeff) Chen
Thomas (Tom) W Laudeman
Jennifer F. Brannock
Michael P. Timko

Contact:

pr8y@virginia.edu