Piccolo (PCLO; also known as Aczonin) is a 530-570 kDa member of a small family of zinc finger proteins that are associated with the cytoskeletal matrix of exocytosis-competent cells. Its name (as well as that of oboe and bassoon) derives from the assumption that this molecule is part of an ensemble of "presynaptic" proteins that orchestrate secretory events at (presynaptic) cell membranes. Piccolo is known to be initially present in the trans-Golgi of neuronal cells. When needed, it is transported to the presynaptic density (or active zones) of GABAergic and glutamergic neurons, and to the plasma membrane of pancreatic beta-cells. It reportedly forms homodimers and heterodimers with Rim2, and serves as a Ca2+ sensor for exocytosis. Human Piccolo is 5065 amino acids (aa) in length. It is a multidomain protein with N-terminal Pro- and Gln-rich sequences, two C4-type Zn-finger motifs (aa 535-1028), one PZD domain (aa 4427-4478) and two membrane-binding C2 domains (aa 4565-5057). There are at least 30 potential Thr/Ser and two Tyr phosphorylation sites. Multiple splice variants exist that principally involve insertions and deletions. None of the splice forms are missing, or show substitutions for, the range of amino acids used by R&D Systems for antibody production. Two splice forms contain identical insertions of 7, 8, 9, 17, 43 and 54 aa, and differ only in a deletion of 60 aa at the C-terminus. A third splice variant shows a 48 aa substitution for aa 443-5065, while a fourth isoform utilizes an alternative start site at Met4459 that is coupled to 1) a 17 aa insertion after Lys4570, and 2) a deletion of aa 4798-5065. Over aa 4065-4328, human Piccolo shares 97% aa sequence identity with mouse Piccolo.

Long Name

Presynaptic Cytomatrix Protein

Alternate Names

ACZ, Aczonin, PCLO

Entrez Gene IDs

27445 (Human); 26875 (Mouse); 56768 (Rat)

Gene Symbol

PCLO

UniProt

NP_149015

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Product Specific Notices for Human Piccolo Alexa Fluor® 488-conjugated Antibody

This product is provided under an agreement between Life Technologies Corporation and R&D Systems, Inc, and the manufacture, use, sale or import of this product is subject to one or more US patents and corresponding non-US equivalents, owned by Life Technologies Corporation and its affiliates. The purchase of this product conveys to the buyer the non-transferable right to use the purchased amount of the product and components of the product only in research conducted by the buyer (whether the buyer is an academic or for-profit entity). The sale of this product is expressly conditioned on the buyer not using the product or its components (1) in manufacturing; (2) to provide a service, information, or data to an unaffiliated third party for payment; (3) for therapeutic, diagnostic or prophylactic purposes; (4) to resell, sell, or otherwise transfer this product or its components to any third party, or for any other commercial purpose. Life Technologies Corporation will not assert a claim against the buyer of the infringement of the above patents based on the manufacture, use or sale of a commercial product developed in research by the buyer in which this product or its components was employed, provided that neither this product nor any of its components was used in the manufacture of such product. For information on purchasing a license to this product for purposes other than research, contact Life Technologies Corporation, Cell Analysis Business Unit, Business Development, 29851 Willow Creek Road, Eugene, OR 97402, Tel: (541) 465-8300. Fax: (541) 335-0354.

For research use only

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Human Piccolo Alexa Fluor® 488-conjugated Antibody

R&D Systems, part of Bio-Techne | Catalog # AF7935G

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Background: Piccolo