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GO:0080110

Overview

Field Value
Namespace Biological process
Short description Sporopollenin biosynthetic process
Full defintion The chemical reactions and pathways resulting in the formation of sporopollenin, a primary constituent of the pollen exine layer.
Subterm of

Relationships

The relationship of GO:0080110 with other GO terms.

Relationship type GO terms
Is a
Regulates n.a.
Part of
Positively regulates n.a.
Negatively regulates n.a.

Ancestor tree

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Additional data

This table contains additional metadata associated with the GO entry's definition field.

Field Value
PMID
A novel fatty Acyl-CoA Synthetase is required for pollen development and sporopollenin biosynthesis in Arabidopsis.
Plant Cell. ; 21 (2): 507–25.PMID: 19218397

Acyl-CoA Synthetase (ACOS) genes are related to 4-coumarate:CoA ligase (4CL) but have distinct functions. The Arabidopsis thaliana ACOS5 protein is in clade A of Arabidopsis ACOS proteins, the clade most closely related to 4CL proteins. This clade contains putative nonperoxisomal ACOS enzymes conserved in several angiosperm lineages and in the moss Physcomitrella patens. Although its function is unknown, ACOS5 is preferentially expressed in the flowers of all angiosperms examined. Here, we show that an acos5 mutant produced no pollen in mature anthers and no seeds by self-fertilization and was severely compromised in pollen wall formation apparently lacking sporopollenin or exine. The phenotype was first evident at stage 8 of anther development and correlated with maximum ACOS5 mRNA accumulation in tapetal cells at stages 7 to 8. Green fluorescent protein-ACOS5 fusions showed that ACOS5 is located in the cytoplasm. Recombinant ACOS5 enzyme was active against oleic acid, allowing kinetic constants for ACOS5 substrates to be established. Substrate competition assays indicated broad in vitro preference of the enzyme for medium-chain fatty acids. We propose that ACOS5 encodes an enzyme that participates in a conserved and ancient biochemical pathway required for sporopollenin monomer biosynthesis that may also include the Arabidopsis CYP703A2 and MS2 enzymes.

Associated Lotus transcripts 4

GO predictions are based solely on the InterPro-to-GO mappings published by EMBL-EBI, which are in turn based on the mapping of predicted domains to the InterPro dataset. The InterPro-to-GO mapping was last updated on , while the GO metadata was last updated on .

Transcript Name Description GO terms GO count
PREDICTED: tetraketide alpha-pyrone reductase 1-like [Cicer arietinum] gi|502081126|ref|XP_004486774.1| 2
Dihydroflavonol 4-reductase family; TAIR: AT4G35420.1 dihydroflavonol 4-reductase-like1; Swiss-Prot: sp|Q500U8|TKPR1_ARATH Tetraketide alpha-pyrone reductase 1; TrEMBL-Plants: tr|G7IUM5|G7IUM5_MEDTR Dihydroflavonol reductase; Found in the gene: LotjaGi3g1v0020100 2
Dihydroflavonol 4-reductase family; TAIR: AT4G35420.1 dihydroflavonol 4-reductase-like1; Swiss-Prot: sp|Q500U8|TKPR1_ARATH Tetraketide alpha-pyrone reductase 1; TrEMBL-Plants: tr|G7IUM5|G7IUM5_MEDTR Dihydroflavonol reductase; Found in the gene: LotjaGi3g1v0020100 2
Dihydroflavonol reductase; TAIR: AT4G35420.1 dihydroflavonol 4-reductase-like1; Swiss-Prot: sp|Q500U8|TKPR1_ARATH Tetraketide alpha-pyrone reductase 1; TrEMBL-Plants: tr|G7IUM5|G7IUM5_MEDTR Dihydroflavonol reductase; Found in the gene: LotjaGi3g1v0020100 2

Co-occuring GO terms 1

A list of co-occurring GO terms within the L. japonicus gene space:

GO term Namespace Name Observations Saturation (%)
Biological process Sporopollenin biosynthetic process 1 25.00