Light-harvesting complex (LHC)

A *light-harvesting complex* is a general term for a group of membrane-bound pigment-protein complexes found in plants, algae, and photosynthetic bacteria. These complexes consist of proteins tightly associated with pigment molecules such as chlorophylls and carotenoids. Their primary role is to absorb solar energy and transfer that excitation energy efficiently to the photosynthetic reaction centers, enabling the conversion of light energy into chemical energy during photosynthesis. Major representatives include light-harvesting complexes I and II (LHI, LHII) in bacteria, and LHCII in green plants, which is the most abundant membrane protein on Earth[2][3][4]. Members of this complex also play significant roles in protecting plants against photo-damage by dissipating excess absorbed light as harmless heat[4]. Light-harvesting complexes are not considered canonical drug targets (such as receptors or enzymes) in therapeutic contexts and hold their main relevance in plant biology, agriculture, and bioengineering. Caveats and notes: - "Light-harvesting complex" is a class or family of pigment-protein complexes and not a unique, singular molecule or canonical therapeutic target[2][3]. - It is not a receptor, enzyme, transporter, or transcription factor. - There is no known therapeutic drug that targets the light-harvesting complex in a clinical context. - If the intent was to refer to a specific light-harvesting protein or chlorophyll a/b-binding protein (such as LHCII), a more specific nomenclature is recommended. In summary: "Light-harvesting complex" (LHC) refers to a diverse group of photosynthetic pigment-protein complexes essential for light absorption and energy transfer in photosynthesis, but it is not a specific therapeutic target or receptor in the conventional biomedical sense[2][3][4].

Other names

Light-harvesting complex proteinlight-harvesting chlorophyll proteinLHC proteinLHCP (light-harvesting chlorophyll a/b-binding protein)LHCII (major light-harvesting complex II)LHILHII