{
  "url": "https://dantelabs.com/traits/shortened-sleep-phase",
  "trait": {
    "bundleId": "2026.10.19-9814e911",
    "release": "2026-09-01",
    "slug": "shortened-sleep-phase",
    "id": "HP:0033063",
    "name": "Shortened sleep phase",
    "definition": "A tendency to sleep fewer hours than usual while feeling well-rested.",
    "synonyms": [
      "Short sleep"
    ],
    "systems": [
      {
        "slug": "abnormality-of-the-nervous-system",
        "name": "Abnormality of the nervous system",
        "url": "https://dantelabs.com/traits/abnormality-of-the-nervous-system"
      }
    ],
    "broader": [
      {
        "slug": "sleep-wake-cycle-disturbance",
        "name": "Sleep-wake cycle disturbance",
        "url": "https://dantelabs.com/traits/sleep-wake-cycle-disturbance"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "npsr1",
        "symbol": "NPSR1",
        "hgnc": "HGNC:23631",
        "name": "neuropeptide S receptor 1",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/npsr1"
      },
      {
        "slug": "adrb1",
        "symbol": "ADRB1",
        "hgnc": "HGNC:285",
        "name": "adrenoceptor beta 1",
        "frequency": "very-frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/adrb1"
      },
      {
        "slug": "oca2",
        "symbol": "OCA2",
        "hgnc": "HGNC:8101",
        "name": "OCA2 melanosomal transmembrane protein",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/oca2"
      },
      {
        "slug": "ube3a",
        "symbol": "UBE3A",
        "hgnc": "HGNC:12496",
        "name": "ubiquitin protein ligase E3A",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ube3a"
      },
      {
        "slug": "bhlhe41",
        "symbol": "BHLHE41",
        "hgnc": "HGNC:16617",
        "name": "basic helix-loop-helix family member e41",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/bhlhe41"
      }
    ]
  }
}