| Chain | GOid | namespace | contents |
| A | 0000166 | molecular_function | nucleotide binding |
| A | 0001614 | molecular_function | purinergic nucleotide receptor activity |
| A | 0001666 | biological_process | response to hypoxia |
| A | 0004931 | molecular_function | extracellularly ATP-gated monoatomic cation channel activity |
| A | 0005216 | molecular_function | monoatomic ion channel activity |
| A | 0005524 | molecular_function | ATP binding |
| A | 0005886 | cellular_component | plasma membrane |
| A | 0006811 | biological_process | monoatomic ion transport |
| A | 0006812 | biological_process | monoatomic cation transport |
| A | 0007165 | biological_process | signal transduction |
| A | 0007268 | biological_process | chemical synaptic transmission |
| A | 0007274 | biological_process | neuromuscular synaptic transmission |
| A | 0009266 | biological_process | response to temperature stimulus |
| A | 0009408 | biological_process | response to heat |
| A | 0009409 | biological_process | response to cold |
| A | 0009612 | biological_process | response to mechanical stimulus |
| A | 0009743 | biological_process | response to carbohydrate |
| A | 0010033 | biological_process | response to organic substance |
| A | 0010524 | biological_process | positive regulation of calcium ion transport into cytosol |
| A | 0014832 | biological_process | urinary bladder smooth muscle contraction |
| A | 0015267 | molecular_function | channel activity |
| A | 0016020 | cellular_component | membrane |
| A | 0030424 | cellular_component | axon |
| A | 0030432 | biological_process | peristalsis |
| A | 0033198 | biological_process | response to ATP |
| A | 0034220 | biological_process | monoatomic ion transmembrane transport |
| A | 0035590 | biological_process | purinergic nucleotide receptor signaling pathway |
| A | 0043005 | cellular_component | neuron projection |
| A | 0043235 | cellular_component | receptor complex |
| A | 0048167 | biological_process | regulation of synaptic plasticity |
| A | 0048266 | biological_process | behavioral response to pain |
| A | 0050804 | biological_process | modulation of chemical synaptic transmission |
| A | 0050850 | biological_process | positive regulation of calcium-mediated signaling |
| A | 0050909 | biological_process | sensory perception of taste |
| A | 0051649 | biological_process | establishment of localization in cell |
| A | 0060079 | biological_process | excitatory postsynaptic potential |
| A | 0070207 | biological_process | protein homotrimerization |
| A | 0070588 | biological_process | calcium ion transmembrane transport |
| A | 0071318 | biological_process | cellular response to ATP |
| A | 0098655 | biological_process | monoatomic cation transmembrane transport |
| A | 0098662 | biological_process | inorganic cation transmembrane transport |
| A | 0098685 | cellular_component | Schaffer collateral - CA1 synapse |
| A | 0098686 | cellular_component | hippocampal mossy fiber to CA3 synapse |
| A | 0098794 | cellular_component | postsynapse |
