{{Rsnum
|rsid=104894561
|Chromosome=17
|Orientation=minus
|geno1=(A;A)
|geno2=(A;G)
|geno3=(G;G)
|Gene=CSNK1D
|position=82265743
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|Gene_s=CSNK1D
}}[[rs104894561]], also known as Thr4Ala or T44A, is a SNP in the casein kinase 1, delta [[CSNK1D]] gene.

Heterozygotes for [[rs104894561]] have been reported to have a [[sleep disorder]], Familial Advanced Sleep Phase syndrome 2 (FASPS2), and it is therefore considered to be inherited as an autosomal dominant trait. The condition is marked by a ~4 hour shift towards earlier bedtime and rising time compared to most people.{{PMID|15800623}}


{{omim
|id=600864
|rsnum=104894561
|variant=0001
}}{{ClinVar
|rsid=104894561
|Reversed=1
|FwdREF=A
|FwdALT=G
|REF=T
|ALT=C
|RSPOS=80223619
|CHROM=17
|dbSNPBuildID=132
|SSR=0
|SAO=1
|VP=0x050260000000000002110100
|GENEINFO=CSNK1D:1453
|GENE_NAME=CSNK1D
|GENE_ID=1453
|WGT=0
|VC=SNV
|CLNALLE=1
|CLNHGVS=NC_000017.10:g.80223619T>C
|CLNORIGIN=1
|CLNSIG=5
|Tags=RV;PM;S3D;OTHERKG;LSD;OM
|CLNACC=RCV000009280.3
|CLNDBN=Advanced sleep phase syndrome, familial, 2
|CLNDSDB=MedGen:OMIM:Orphanet
|CLNDSDBID=CN169521:615224:164736
|CLNSRC=OMIM Allelic Variant
|CLNSRCID=600864.0001
|Disease=Advanced sleep phase syndrome
}}