Could regulate export of the bud site and axial growth sites selection protein AXL2 and possibly other secretory proteins from the endoplasmic reticulum in COPII-coated vesicles. Seems to be required for axial budding pattern in haploid cells.
psbT photosystem II reaction center protein T; Rev
81.32
>KOG2729 consensus ER vesicle integral membrane protein involved in establishing cell polarity, signaling and protein degradation [Posttranslational modification, protein turnover, chaperones; Intracellular trafficking, secretion, and vesicular transport; Signal transduction mechanisms]
>PF03311 Cornichon: Cornichon protein; InterPro: IPR003377 The drosophila cornichon protein (gene: cni) [] is required in the germline for dorsal-ventral signalling
The dorsal-ventral pattern formation involves a reorganisation of the microtubule network correlated with the movement of the oocyte nucleus, and depending on the initial correct establishment of the anterior-posterior axis via a signal from the oocyte produced by cornichon and gurken and received by torpedo protein in the follicle cells. The biochemical function of the cornichon protein is currently not known. It is a protein of 144 residues that seems to contain three transmembrane regions. ; GO: 0035556 intracellular signal transduction, 0016020 membrane
>PF01405 PsbT: Photosystem II reaction centre T protein; InterPro: IPR001743 Oxygenic photosynthesis uses two multi-subunit photosystems (I and II) located in the cell membranes of cyanobacteria and in the thylakoid membranes of chloroplasts in plants and algae
Photosystem II (PSII) has a P680 reaction centre containing chlorophyll 'a' that uses light energy to carry out the oxidation (splitting) of water molecules, and to produce ATP via a proton pump. Photosystem I (PSI) has a P700 reaction centre containing chlorophyll that takes the electron and associated hydrogen donated from PSII to reduce NADP+ to NADPH. Both ATP and NADPH are subsequently used in the light-independent reactions to convert carbon dioxide to glucose using the hydrogen atom extracted from water by PSII, releasing oxygen as a by-product. PSII is a multisubunit protein-pigment complex containing polypeptides both intrinsic and extrinsic to the photosynthetic membrane [, ]. Within the core of the complex, the chlorophyll and beta-carotene pigments are mainly bound to the antenna proteins CP43 (PsbC) and CP47 (PsbB), which pass the excitation energy on to the reaction centre proteins D1 (Qb, PsbA) and D2 (Qa, PsbD) that bind all the redox-active cofactors involved in the energy conversion process. The PSII oxygen-evolving complex (OEC) oxidises water to provide protons for use by PSI, and consists of OEE1 (PsbO), OEE2 (PsbP) and OEE3 (PsbQ). The remaining subunits in PSII are of low molecular weight (less than 10 kDa), and are involved in PSII assembly, stabilisation, dimerisation, and photo-protection []. This family represents the low molecular weight transmembrane protein PsbT found in PSII, which is thought to be associated with the D1 (PsbA) - D2 (PsbD) heterodimer. PsbT may be involved in the formation and/or stabilisation of dimeric PSII complexes, because in the absence of this protein dimeric PSII complexes were found to be less abundant. Furthermore, although PsbT does not confer photo-protection, it is required for the efficient recovery of photo-damaged PSII [].; GO: 0015979 photosynthesis, 0009523 photosystem II, 0009539 photosystem II reaction center, 0016020 membrane; PDB: 3BZ1_T 1S5L_t 2AXT_t 3KZI_T 3PRQ_T 3BZ2_T 3PRR_T 4FBY_g 3A0H_t 3A0B_T ....
>PRK11875 psbT photosystem II reaction center protein T; Reviewed
