PMID- 7686157 OWN - NLM STAT- MEDLINE DCOM- 19930727 LR - 20231213 IS - 0021-9258 (Print) IS - 0021-9258 (Linking) VI - 268 IP - 19 DP - 1993 Jul 5 TI - Molecular cloning and characterization of ficolin, a multimeric protein with fibrinogen- and collagen-like domains. PG - 14505-13 AB - We have previously identified and purified transforming growth factor-beta 1 (TGF-beta 1)-binding proteins from porcine uterus membranes (Ichijo, H., Ronnstrand, L., Miyagawa, K., Ohashi, H., Heldin, C.-H., and Miyazono, K. (1991) J. Biol. Chem. 266, 22459-22464). One of these TGF-beta 1-binding proteins, with a molecular weight of 40,000, was purified to homogeneity and subjected to amino acid sequence analysis. The amino acid sequences obtained were used to isolate two closely related cDNA clones from a porcine uterus cDNA library. The deduced amino acid sequences revealed that both cDNAs encoded proteins that were mainly composed of fibrinogen-like and collagen-like domains. Therefore, they were denoted ficolin-alpha and ficolin-beta. Expression of ficolin-alpha and -beta cDNA in mammalian cells revealed that ficolin forms dimers, trimers, and several higher order of oligomers, whose molecular weights fit well with those of the purified TGF-beta 1-binding proteins from porcine uterus. Moreover, immunoblotting analysis using a peptide anti-serum against ficolin indicated that the TGF-beta 1-binding proteins identified in porcine uterus are ficolin-alpha, -beta, and their oligomers or closely related molecules. However, recombinant ficolin-alpha and -beta did not bind TGF-beta 1, despite the similarities in molecular weights and immunoreactivity with the material from the natural source. It is possible that a specific posttranslational modification of ficolin or interaction with another component is needed for TGF-beta 1 binding. Analysis by Northern blotting revealed that the expression of ficolin-alpha mRNA is relatively restricted and most abundant in placenta and lung. On the other hand, ficolin-beta was mainly expressed in skeletal muscle. The in vivo functions of ficolin will be discussed. FAU - Ichijo, H AU - Ichijo H AD - Ludwig Institute for Cancer Research, Uppsala, Sweden. FAU - Hellman, U AU - Hellman U FAU - Wernstedt, C AU - Wernstedt C FAU - Gonez, L J AU - Gonez LJ FAU - Claesson-Welsh, L AU - Claesson-Welsh L FAU - Heldin, C H AU - Heldin CH FAU - Miyazono, K AU - Miyazono K LA - eng SI - GENBANK/L12344 SI - GENBANK/L12345 PT - Comparative Study PT - Journal Article PL - United States TA - J Biol Chem JT - The Journal of biological chemistry JID - 2985121R RN - 0 (Carrier Proteins) RN - 0 (Lectins) RN - 0 (Macromolecular Substances) RN - 0 (Peptide Fragments) RN - 0 (RNA, Messenger) RN - 0 (Transforming Growth Factor beta) RN - 24937-83-5 (Poly A) RN - 63231-63-0 (RNA) RN - 9001-32-5 (Fibrinogen) RN - 9007-34-5 (Collagen) RN - 9007-49-2 (DNA) SB - IM MH - Amino Acid Sequence MH - Animals MH - Base Sequence MH - Blotting, Northern MH - Carrier Proteins/biosynthesis/*genetics/isolation & purification MH - Chromatography, Affinity MH - Cloning, Molecular/methods MH - Collagen/*genetics MH - DNA MH - Female MH - Fibrinogen/*genetics MH - Gene Expression MH - Gene Library MH - Humans MH - *Lectins MH - Macromolecular Substances MH - Molecular Sequence Data MH - Molecular Weight MH - Peptide Fragments/isolation & purification MH - Poly A/genetics/isolation & purification MH - RNA/genetics/isolation & purification MH - RNA, Messenger MH - Sequence Homology, Amino Acid MH - Swine MH - Transfection MH - Transforming Growth Factor beta/metabolism MH - Uterus/*metabolism MH - Ficolins EDAT- 1993/07/05 00:00 MHDA- 1993/07/05 00:01 CRDT- 1993/07/05 00:00 PHST- 1993/07/05 00:00 [pubmed] PHST- 1993/07/05 00:01 [medline] PHST- 1993/07/05 00:00 [entrez] AID - S0021-9258(19)85267-5 [pii] PST - ppublish SO - J Biol Chem. 1993 Jul 5;268(19):14505-13.