Crooked neck is a component of the human spliceosome and implicated in the splicing process

Seyung Chung, Zhaolan Zhou, Kathleen A. Huddleston, Douglas A. Harrison, Robin Reed, Timothy A. Coleman, Brian C. Rymond

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


The Drosophila crooked neck (crn) gene is essential for embryogenesis and has been implicated in cell cycle progression and in pre-mRNA splicing although a direct role in either process has not been established. Here we report isolation of the human crooked neck homolog, HCRN, and provide evidence for its function in splicing. HCRN encodes an unusual protein composed largely of tetratricopeptide repeat (TPR) elements. The crooked neck protein co-localizes with the SR and Sm protein splicing factors in discrete subnuclear domains implicated in snRNP biogenesis. In vitro assembly experiments show that an 83 kDa hcrn isoform is stably recruited to splicing complexes coincident with the addition of the U4/U6.U5 tri-snRNP particle. Crooked neck activity appears essential as extracts depleted of hcrn fail to splice pre-mRNA. These and related data support the view that crooked neck is a phylogenetically conserved pre-mRNA splicing factor.

Original languageEnglish
Pages (from-to)287-297
Number of pages11
JournalBiochimica et Biophysica Acta - Gene Structure and Expression
Issue number3
StatePublished - Jul 19 2002

Bibliographical note

Funding Information:
The authors thank Jennifer Klein and Shelly Steiner for supplying the HeLa cells used for crooked neck localization. This work was funded through grants from the National Institutes of Health to BCR and RR.


  • RNA processing
  • Spliceosome
  • Splicing
  • Tetratricopeptide repeat

ASJC Scopus subject areas

  • Structural Biology
  • Biophysics
  • Biochemistry
  • Genetics


Dive into the research topics of 'Crooked neck is a component of the human spliceosome and implicated in the splicing process'. Together they form a unique fingerprint.

Cite this