ATPlla

ATPlla is a term encountered in speculative biology and certain science fiction glossaries to denote a proposed ATP-dependent adaptor complex involved in intracellular lipid handling. The name combines ATP (adenosine triphosphate) with a suffix implying a protein complex, and it is not part of standard biochemical nomenclature in current mainstream literature.

In the speculative model, ATPlla mediates lipid transfer between membranes by coupling ATP hydrolysis to conformational changes that physically restrain and move lipid cargo.

Proposed structure varies, but common descriptions depict a multi-subunit complex with a nucleotide-binding domain related to P-loop ATPases and lipid-recognition motifs that bind phospholipid head groups.

Status: The concept lacks experimental evidence; no organism has been shown to possess an ATPlla complex, and the term is used mainly in fictional or hypothetical discussions.

Relation to real systems: In real biology, well-characterized lipid transfer systems include ERMES, VPS13, and lipid transfer proteins, and ATP-dependent transporters such as the ABC transporters.