Histone H1.4 is a protein that in humans is encoded by the HIST1H1E gene.

Histones are basic nuclear proteins responsible for nucleosome structure of the chromosomal fiber in eukaryotes. Two molecules of each of the four core histones (H2A, H2B, H3, and H4) form an octamer, around which approximately 146 bp of DNA is wrapped in repeating units, called nucleosomes. The linker histone, H1, interacts with linker DNA between nucleosomes and functions in the compaction of chromatin into higher order structures. This gene is intronless and encodes a member of the histone H1 family. Transcripts from this gene lack polyA tails but instead contain a palindromic termination element. This gene is found in the large histone gene cluster on chromosome 6.

HIST1H1E syndrome is a rare autosomal dominant disorder caused by a heterozygous pathogenic variant in the HIST1H1E gene, which is characterized by a set of recognizable clinical features such as hypotonia, intellectual disability, behavioral issues, skeletal, testes (undescended) and thyroid, heart anomalies, and ectodermal issues.