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5-504: 242851 ENSG00000214415 ENSMUSG00000028777 A8MTJ3 Q3V3I2 NM_001102386 NM_001081143 NP_001095856 NP_001074612 Guanine nucleotide-binding protein G(t) subunit alpha-3 , also known as gustducin alpha-3 chain , is a protein subunit that in humans is encoded by the GNAT3 gene . Gustducin alpha-3 chain is a subunit of the heterotrimeric G protein gustducin that
10-422: A protein complex may be identical, homologous or totally dissimilar and dedicated to disparate tasks. In some protein assemblies, one subunit may be a "catalytic subunit" that enzymatically catalyzes a reaction, whereas a "regulatory subunit" will facilitate or inhibit the activity. Although telomerase has telomerase reverse transcriptase as a catalytic subunit, regulation is accomplished by factors outside
15-541: A relatively small number of subunits are referred to as oligomeric . For example, hemoglobin is a symmetrical arrangement of two identical α-globin subunits and two identical β-globin subunits. Longer multimeric proteins such as microtubules and other cytoskeleton proteins may consist of very large numbers of subunits. For example, dynein is a multimeric protein complex involving two heavy chains (DHCs), two intermediate chains (ICs), two light-intermediate chains (LICs) and several light chains (LCs). The subunits of
20-531: A small number of types of protein subunits as building blocks. A subunit is often named with a Greek or Roman letter, and the numbers of this type of subunit in a protein is indicated by a subscript. For example, ATP synthase has a type of subunit called α. Three of these are present in the ATP synthase molecule, leading to the designation α 3 . Larger groups of subunits can also be specified, like α 3 β 3 -hexamer and c-ring. Naturally occurring proteins that have
25-409: Is responsible for basic taste . This article on a gene on human chromosome 7 is a stub . You can help Misplaced Pages by expanding it . Protein subunit In structural biology , a protein subunit is a polypeptide chain or single protein molecule that assembles (or " coassembles ") with others to form a protein complex . Large assemblies of proteins such as viruses often use
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