{
  "url": "https://dantelabs.com/traits/reduced-social-smiling",
  "trait": {
    "bundleId": "2026.10.19-9814e911",
    "release": "2026-09-01",
    "slug": "reduced-social-smiling",
    "id": "HP:5200102",
    "name": "Reduced social smiling",
    "definition": "Reduced production of smiles during engagement with an interactive parent, caregiver, or peer.",
    "synonyms": [],
    "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": "delayed-early-childhood-social-milestone-development",
        "name": "Delayed social development",
        "url": "https://dantelabs.com/traits/delayed-early-childhood-social-milestone-development"
      },
      {
        "slug": "reduced-social-responsiveness",
        "name": "Poor social interactions",
        "url": "https://dantelabs.com/traits/reduced-social-responsiveness"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "inpp4a",
        "symbol": "INPP4A",
        "hgnc": "HGNC:6074",
        "name": "inositol polyphosphate-4-phosphatase type I A",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/inpp4a"
      },
      {
        "slug": "rnu2-2",
        "symbol": "RNU2-2",
        "hgnc": "HGNC:10152",
        "name": "RNA, U2 small nuclear 2",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/rnu2-2"
      },
      {
        "slug": "nav3",
        "symbol": "NAV3",
        "hgnc": "HGNC:15998",
        "name": "neuron navigator 3",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/nav3"
      }
    ]
  }
}