LOC100829928/Bradi3g48840v3 encodes BdPAL5, a Brachypodium distachyon phenylalanine ammonia-lyase family enzyme. It is predicted to convert L-phenylalanine to trans-cinnamate, feeding phenylpropanoid metabolism, and published expression data support jasmonate-responsive regulation.
| GO Term | Evidence | Action | Reason |
|---|---|---|---|
| GO:0003824 catalytic activity | IEA GO_REF:0000002 | MARK AS OVER ANNOTATED | Summary: MARK_AS_OVER_ANNOTATED. Correct but too general; phenylalanine ammonia-lyase activity is already present and more informative. Reason: The protein is not merely a generic catalyst: UniProt assigns EC 4.3.1.24, the InterPro signatures include a phenylalanine ammonia-lyase-specific family, and the review already contains the specific GO:0045548 molecular function. Supporting Evidence: file:BRADI/LOC100829928/LOC100829928-uniprot.txt RecName: Full=Phenylalanine ammonia-lyase; EC=4.3.1.24. file:BRADI/LOC100829928/LOC100829928-uniprot.txt InterPro; IPR005922; Phe_NH3-lyase. |
| GO:0005737 cytoplasm | IEA GO_REF:0000120 | ACCEPT | Summary: ACCEPT. The UniProt record includes cytoplasmic localization. Reason: Cytoplasmic localization is consistent with the UniProt subcellular location statement and with soluble PAL-family enzymes that initiate phenylpropanoid metabolism. The Falcon report did not find BdPAL5-specific localization imaging, but Brachypodium PAL/PTAL activity is mainly cytosolic and phenylpropanoid entry enzymes act upstream of ER-anchored downstream steps. Supporting Evidence: file:BRADI/LOC100829928/LOC100829928-uniprot.txt SUBCELLULAR LOCATION: Cytoplasm. file:BRADI/LOC100829928/LOC100829928-deep-research-falcon.md No BdPAL5-specific localization experiment was recovered; related Brachypodium PAL/PTAL evidence supports a mainly cytosolic enzyme near ER-associated phenylpropanoid metabolism. |
| GO:0006559 L-phenylalanine catabolic process | IEA GO_REF:0000002 | KEEP AS NON CORE | Summary: KEEP_AS_NON_CORE. Phenylalanine is consumed by the enzyme, but the core biological context is trans-cinnamate and phenylpropanoid biosynthesis. Reason: The catalytic reaction deaminates L-phenylalanine, so the catabolic process term is mechanistically true. It is less central than the product pathway terms because this enzyme is best understood as the entry step to trans-cinnamate and phenylpropanoid biosynthesis. Supporting Evidence: file:BRADI/LOC100829928/LOC100829928-uniprot.txt L-phenylalanine = (E)-cinnamate + NH4(+). |
| GO:0009699 phenylpropanoid biosynthetic process | IEA GO_REF:0000117 | ACCEPT | Summary: ACCEPT. PAL catalyzes the entry step into phenylpropanoid biosynthesis. Reason: Phenylalanine ammonia-lyase is the canonical entry enzyme into the phenylpropanoid pathway, and UniProt maps this protein to trans-cinnamate biosynthesis from L-phenylalanine. Falcon found Brachypodium literature mapping Bradi3g48840/LOC100829928 to BdPAL5 and showing jasmonate-responsive induction, but not purified BdPAL5 kinetics. Supporting Evidence: file:BRADI/LOC100829928/LOC100829928-uniprot.txt PATHWAY: Phenylpropanoid metabolism; trans-cinnamate biosynthesis; (E)-cinnamate from L-phenylalanine. file:BRADI/LOC100829928/LOC100829928-deep-research-falcon.md Cass et al. list Bradi3g48840/LOC100829928 as BdPAL5 among eight Brachypodium PAL genes; Kouzai et al. report strong jasmonate induction, consistent with inducible phenylpropanoid entry capacity. |
| GO:0016841 ammonia-lyase activity | IEA GO_REF:0000002 | KEEP AS NON CORE | Summary: KEEP_AS_NON_CORE. Correct parent activity, but phenylalanine ammonia-lyase activity is the specific function. Reason: Ammonia-lyase activity is a valid parent for PAL/HAL-family enzymes, but the InterPro Phe_NH3-lyase signature and EC 4.3.1.24 support the more precise phenylalanine ammonia-lyase activity term. Supporting Evidence: file:BRADI/LOC100829928/LOC100829928-uniprot.txt SIMILARITY: Belongs to the PAL/histidase family. file:BRADI/LOC100829928/LOC100829928-uniprot.txt InterPro; IPR005922; Phe_NH3-lyase. |
| GO:0045548 phenylalanine ammonia-lyase activity | IEA GO_REF:0000120 | ACCEPT | Summary: ACCEPT. This is the specific molecular function supported by EC 4.3.1.24. Reason: This is the best molecular-function annotation for the protein. Although the PANTHER root is the broader histidine-ammonia-lyase family, the UniProt enzyme assignment, reaction, and phenylalanine ammonia-lyase-specific InterPro signature all point to PAL rather than a different aromatic ammonia-lyase paralog. Falcon research further notes that BdPTAL1 is the Brachypodium PAL-family enzyme with strong bifunctional PAL/TAL support, so BdPAL5 should be treated conservatively as PAL unless BdPAL5-specific substrate data emerge. Supporting Evidence: file:BRADI/LOC100829928/LOC100829928-uniprot.txt RecName: Full=Phenylalanine ammonia-lyase; EC=4.3.1.24. file:BRADI/LOC100829928/LOC100829928-uniprot.txt L-phenylalanine = (E)-cinnamate + NH4(+). file:BRADI/LOC100829928/LOC100829928-deep-research-falcon.md The report maps LOC100829928/Bradi3g48840 to BdPAL5; it found direct family/expression support but no purified BdPAL5 kinetic comparison of L-phenylalanine versus L-tyrosine. |
| GO:0009800 cinnamic acid biosynthetic process | IEA GO_REF:0000041 | ACCEPT | Summary: ACCEPT. UniPathway correctly captures the product-side pathway context: phenylalanine ammonia-lyase produces trans-cinnamate from L-phenylalanine. Reason: This is direct pathway context for the enzyme activity. The product of the PAL reaction is trans-cinnamate, so cinnamic acid biosynthesis is not a distant downstream inference. Supporting Evidence: file:BRADI/LOC100829928/LOC100829928-uniprot.txt PATHWAY: Phenylpropanoid metabolism; trans-cinnamate biosynthesis; (E)-cinnamate from L-phenylalanine. |
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