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

This product is provided under an intellectual property license from Life Technologies Corporation. The transfer of this product is conditioned on the buyer using the purchased product solely in research conducted by the buyer, excluding contract research or any fee for service research, and the buyer must not (1) use this product or its components for (a) diagnostic, therapeutic or prophylactic purposes; (b) testing, analysis or screening services, or information in return for compensation on a per-test basis; or (c) manufacturing or quality assurance or quality control, and/or (2) sell or transfer this product or its components for resale, whether or not resold for use in research. For information on purchasing a license to this product for purposes other than as described above, contact Life Technologies Corporation, 5781 Van Allen Way, Carlsbad, CA 92008 USA or outlicensing@thermofisher.com.

For research use only

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Human Piccolo Alexa Fluor™ Plus 488-conjugated Antibody

R&D Systems, part of Bio-Techne | Catalog # AF7935AFP488

Key Product Details

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Antibody Source

View all Piccolo Antibodies »

Product Specifications

Specificity

Clonality

Host

Isotype

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Immunohistochemistry

Background: Piccolo