Sequence of a cDNA encoding the ferritin H-chain from an 11-week-old human fetal brain.
A cDNA library in lambda Charon BS(-) from 11-week-old human fetal brain (FB) was screened using a human liver ferritin (FTH)-encoding cDNA as a probe. The complete sequence of the positive clone, cFB1, showed that the coding region and a part of the 5' and 3' untranslated regions (UTR) are identical to the corresponding published sequence of the liver cDNA. However, a particularly noteworthy difference is the presence of 279 bp of additional sequence in the FB 3'-UTR. Northern blot analysis of FB poly(A)+RNA showed it to be a part of the FTH transcript. Comparison of the 279-bp sequence with the GenBank and EMBL databases showed it to be 94.1, 62.5, and 58.9% similar to segments from human, mouse and rat FTH genomic sequences, respectively. However, in all these cases, only a part of this 279-bp sequence has been found in the nontranscribed region. We therefore conclude that in FB, the 279-bp sequence is a part of the mature FTH mRNA. Sequence analysis also suggests a differential poly(A) site selection in the production of FTH mRNA in FB and liver.[1]References
- Sequence of a cDNA encoding the ferritin H-chain from an 11-week-old human fetal brain. Dhar, M., Chauthaiwale, V., Joshi, J.G. Gene (1993) [Pubmed]
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