TATB_ARATH » Sec-independent protein translocase protein TATB, chloroplastic

TATB_ARATH » Sec-independent protein translocase protein TATB, chloroplastic
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Topology in Thylakoid membrane
Topologythylakoid lumen
chloroplast stroma
TATB_ARATH » Sec-independent protein translocase protein TATB, chloroplastic » Protein HIGH CHLOROPHYLL FLUORESCENCE 106;Protein TWIN-ARGININE TRANSLOCATION B;
Hydrophobic Thickness 34.0 ± 5.0 Å
Tilt Angle 23 ± 1°
ΔGtransfer -21.5 kcal/mol
ΔGfold -6.4 kcal/mol
Links UniProtKB, Pfam, Interpro, iHOP, STRING
Topology Out
TM Segments 81-105 (71-105)
Pathways none
PDB none
OPM none
Complexes none
Interactions none
Domains

AA: 89-166, PDBID: 2L16, Subunit A, Seq Identity:24%, mttA/Hcf106 family

UniProt annotation for TATB_ARATH » Sec-independent protein translocase protein TATB, chloroplastic
FUNCTION: Part of the twin-arginine translocation (Tat) system that transports large folded proteins containing a characteristic twin-arginine motif in their signal peptide across the thylakoid membrane. Involved in delta pH-dependent protein transport required for chloroplast development, especially thylakoid membrane formation. TATC and TATB mediate precursor recognition, whereas TATA facilitates translocation (By similarity).

SUBUNIT: In thylakoid membranes, TATC and TATB form a large receptor complex, containing about eight TATC-TATB pairs, which binds the precursor protein. Twin arginine signal peptide promotes pH-triggered docking of TATA oligomers to TATC-TATB receptor complex, inducing a conformational switch of TATA that results in activation of the translocase. TATA dissociates from TATC-TATB upon completion of translocation.

UniProt features for TATB_ARATH » Sec-independent protein translocase protein TATB, chloroplastic
TRANSIT 1 83 Chloroplast (Potential).
CHAIN 84 260 Sec-independent protein translocase protein TATB, chloroplastic.
Amino Acid Sequence for TATB_ARATH » Sec-independent protein translocase protein TATB, chloroplastic
MAMALQIIAS SSSSPTITKS HLFSYPPLQS RYKASKPNLS SWFSLLGSSR FSPYIGLKHL GISISPKSSN PEKKRRCKSM MIRASLFGVG APEALVIGVV ALLVFGPKGL AEVARNLGKT LRTFQPTIRE LQDVSRDFKS TLEREIGLDD ISTPNVYNQN RTNPVQPPPP PPPPSVPSTE APVTANDPND SQSPKAYTSE DYLKFTEEQL KALSPAESQT EDQTQTQEPP QPTTVQTPTG ESQPNGTARE TTAASPPRQD