Search results for " Complement"

Structural and functional diversity of the lectin repertoire in teleost fish: Relevance to innate and adaptive immunity

2011

Protein–carbohydrate interactions mediated by lectins have been recognized as key components of innate immunity in vertebrates and invertebrates, not only for recognition of potential pathogens, but also for participating in downstream effector functions, such as their agglutination, immobilization, and complement-mediated opsonization and killing. More recently, lectins have been identified as critical regulators of mammalian adaptive immune responses. Fish are endowed with virtually all components of the mammalian adaptive immunity, and are equipped with a complex lectin repertoire. In this review, we discuss evidence suggesting that: (a) lectin repertoires in teleost fish are highly dive…

cDNA sequence and tissue expression of an antimicrobial peptide, dicentracin; a new component of the moronecidin family isolated from head kidney leu…

2007

A 483-bp cDNA was isolated from sea bass (Dicentrarchus labrax) head kidney leukocytes, dicentracin, using PCR primers designed from conserved moronecidin domains. Gene bank analysis revealed that dicentracin cDNA belongs to the moronecidin family. As deduced from alignment with Morone chrysops moronecidin, the precursor of 79 aa appeared to be composed of a signal peptide of 22 aa, followed by the mature AMP (antimicrobial peptide) of 22 aa named dicentracin, and a C-terminal extension of 35 aa. Dicentracin precursor displayed 3 aa substitutions with other moronecidin sequence but none in the mature peptide sequence. Using in situ hybridization assay, dicentracin gene expression was observ…

Spectroscopic Methods for the Determination of Protein Interactions

2005

This unit provides guidelines on how to use steady-state fluorescence spectroscopy for the quantification of protein-protein interactions. The fluorescence of a protein is characterized by its excitation and emission spectra, quantum yield, and anisotropy. These parameters can change upon interaction with another protein and can be used to measure the extent of complex formation. The source of fluorescence can be an intrinsic fluorophore, such as tryptophan or tyrosine; a covalently attached fluorescent dye; or a fluorescent binding partner, such as a nucleotide or cofactor, that interacts specifically with the complex. Protocols are provided in this unit for determining affinity constants …

Il fumetto può aiutare nei processi di insegnamento/apprendimento delle Matematiche?

2010

ANALISI STORIOGRAFICA DI ALCUNI ASPETTI DELLA FUNZIONE ZETA DI RIEMANN

Atti GIORNATE DI STUDIO DELL'INSEGNANTE DI MATEMATICA (GIMat).Le mani, la parola, la testa: capire, argomentare, dimostrare in matematica

2022

Nello spirito di sempre, gli atti del convegno, pubblicati prima del convegno stesso, vogliono offrire ai lettori, anche attraverso i 25 contributi scritti/presentati da insegnanti, insegnanti/ricercatori e ricercatori universitari intervenuti a GIMat 2022 e riportati di seguito, la possibilità di riflettere prima, durante e dopo le stesse GIMat su tante esperienze portate avanti sul territorio nazionale e internazionale, nell’ambito dell’Educazione matematica

A che punto è la notte: i numeri delle donne nella matematica italiana.

2018

(EN) Gender equality in scientific research is a problematic issue and has been much debated in the last years. As a consequence, some countries have implemented policies to address the problem. In this paper we collected and analysed the last data regarding the academic careers on women mathematician in Italy, as a step for further discussion on possible positive actions. (IT) La scarsa presenza di donne nella ricerca scientifica ed in particolare nelle posizioni apicali è un problema riconosciuto e una questione molto dibattuta negli ultimi anni, con conseguente attuazione in vari stati di alcune politiche di pari opportunità. In questo articolo abbiamo raccolto ed analizzato i dati più r…

Developmental expression of two Haliotis asinina hemocyanin isoforms

2005

Hemocyanins are large copper-containing respiratory proteins that play a role in oxygen transport in many molluscs. In some species only one hemocyanin isoform is present while in others two are expressed. The physiological relevance of these isoforms is unclear and the developmental and tissue-specific expression of hemocyanin genes is largely unknown. Here we show that two hemocyanin genes in the gastropod Haliotis asinina, which encode H. asinina hemocyanin (HaH1) and HaH2 isoforms, are developmentally expressed. These genes initially are expressed in a small number of mesenchyme cells at trochophore and pre-torsional veliger stages, with HaH1 expression slightly preceding HaH2. These ce…

Different La/SS-B mRNA isoforms are expressed in salivary gland tissue of patients with primary Sjogren's syndrome

1996

Recently we isolated a La/SS-B mRNA isoform from a cDNA library made from peripheral blood lymphocytes of a patient with primary Sjögren's Syndrome. In the La/SS-B mRNA isoform the exon 1 was replaced. The alternative exon was termed exon 1'. Genomic analysis showed that the exon 1' La mRNA was the result of a promoter-switch in combination with alternative splicing. Due to the unusual structure of the exon 1' La/SS-B mRNA, the function and the behaviour under physiological and pathophysiological conditions in tissue of patients with primary Sjögren's syndrome or Systemic Lupus Erythematosus remained obscure. Therefore assays were established allowing a qualitative and quantitative estimati…

A new metallothionein gene from the giant keyhole limpet Megathura crenulata.

2003

Abstract Metallothioneins (MTs) are small soluble proteins ubiquitously expressed in animals and plants. Different isoforms are present in deuterostomes and protostomes. They do not differ greatly in primary structure, but are clearly distinguishable. Here, I present the gene and the complete cDNA of a novel MT from the mollusk Megathura crenulata . This protein is closely related to the Cu-inducible MTs of the vineyard snail Helix pomatia , but has also some minor sequence features typical of Cd-inducible isoforms of H . pomatia and other molluscs. Overall, the deduced primary structure is similar to the known molluscan MTs, but in addition possesses an insertion of 5 amino acids not found…