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Curator verification checklist (SYCE1)

1. Bibliographic confirmation
   - Confirm PMID, journal, year, article type (primary study vs review), and disease context.

2. Variant nomenclature
   - Extract all SYCE1 variants exactly as reported: cDNA, protein, exon/intron, transcript reference, genomic coordinates if given.
   - Note variant class: nonsense, frameshift, splice, missense, CNV/deletion/duplication.

3. Zygosity and phasing
   - Record homozygous, compound heterozygous, hemizygous, or heterozygous status.
   - For multi-variant cases, verify whether variants are in trans/cis and how phasing was established.

4. Inheritance and segregation
   - Extract pedigree structure, affected/unaffected relatives tested, parental carrier status, and segregation pattern.
   - Note consanguinity if reported.

5. Cohort and case count
   - Record number of unrelated families/cases, sex/karyotype of each case, recruitment setting, and inclusion criteria.

6. Clinical phenotypes
   - 46,XX: primary amenorrhea, POI, age at presentation, puberty status, menstrual history, ovarian imaging.
   - 46,XY: NOA, semen analysis, testicular volume, prior infertility workup.
   - Hormones: FSH, LH, AMH, estradiol, testosterone, inhibin B; record units and abnormality direction.

7. Histology and immunostaining
   - Extract gonadal pathology findings: follicle depletion, germ-cell depletion, spermatogenic arrest stage, Sertoli-cell-only, etc.
   - List markers used in IF/IHC/H&E and what they demonstrated (e.g., pachytene arrest, SC defects, synapsis status).

8. Functional/mechanistic assays
   - Identify assay type: protein interaction, co-IP, yeast two-hybrid, cell localization, meiotic spreads, mouse model, transcript/protein quantification.
   - Record whether SYCE1 interaction with SYCP1 and/or C14ORF39/SIX6OS1 was tested and the observed effect.

9. Mechanistic conclusions
   - Verify whether the paper directly supports: SYCE1 loss/reduction -> SC central element assembly failure -> homolog synapsis failure -> pachytene arrest/checkpoint activation -> germ-cell depletion.
   - Distinguish direct human evidence from mouse/in vitro inference.

10. Study limitations and curation decision
   - Capture stated limitations, alternative explanations excluded, and authors' pathogenicity conclusion.
   - Decide whether each claim is supported, partially supported, or needs qualification in the knowledge base.
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*Code_block: This checklist gives curators a compact extraction template for verifying each seed SYCE1 paper. It focuses on the core items needed to confirm variant pathogenicity, inheritance, phenotype, mechanistic evidence, and curation strength.*