Abstract:
:The lectin complement pathway has important functions in vertebrate host defence and accumulating evidence of primordial complement components trace its emergence to invertebrate phyla. We introduce two putative mannose-binding lectin homologues (CioMBLs) from the urochordate species Ciona intestinalis. The CioMBLs display similarities with vertebrate MBLs and comprise a collagen-like region, alpha-helical coiled-coils and a carbohydrate recognition domain (CRD) with conserved residues involved in calcium and carbohydrate binding. Structural analysis revealed an oligomerization through interchain disulphide bridges between N-terminal cysteine residues and cysteines located between the neck region and the CRD. RT-PCR showed a tissue specific expression of CioMBL in the gut and by immunohistochemistry analysis we also demonstrated that CioMBL co-localize with an MBL-associated serine protease in the epithelia cells lining the stomach and intestine. In conclusion we present two urochordate MBLs and identify an associated serine protease, which support the concept of an evolutionary ancient origin of the lectin complement pathway.
journal_name
Dev Comp Immunoljournal_title
Developmental and comparative immunologyauthors
Skjoedt MO,Palarasah Y,Rasmussen K,Vitved L,Salomonsen J,Kliem A,Hansen S,Koch C,Skjodt Kdoi
10.1016/j.dci.2009.08.004subject
Has Abstractpub_date
2010-01-01 00:00:00pages
59-68issue
1eissn
0145-305Xissn
1879-0089pii
S0145-305X(09)00171-2journal_volume
34pub_type
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