Id |
Subject |
Object |
Predicate |
Lexical cue |
T41 |
0-188 |
Sentence |
denotes |
Following the ACE discovery in mid-1950s, despite intense research in the field, no human homologs of the enzyme have been found for more than 50 years (Isaac et al., 1998; Riordan, 2003). |
T42 |
189-340 |
Sentence |
denotes |
It was only in 2000 that two independent research groups identified, almost simultaneously, a new human ACE-like enzyme, with two different approaches. |
T43 |
341-520 |
Sentence |
denotes |
Tipnis et al. (2000) searched for new metalloproteases in an expressed sequence tag (EST) database, finding an ACE homolog (ACEH) with a single domain, similar to that of insects. |
T44 |
521-584 |
Sentence |
denotes |
Subsequently they cloned it from a human lymphoma cDNA library. |
T45 |
585-773 |
Sentence |
denotes |
Interestingly ACEH showed high homology (40% identity and 60% similarity) with ACE, particularly around the HEXXH sequence and highly conserved glutamate residue, involved in zinc binding. |
T46 |
774-866 |
Sentence |
denotes |
Moreover, they demonstrated the presence of seven glycosylation sites (Tipnis et al., 2000). |
T47 |
867-1187 |
Sentence |
denotes |
In the same year, Donoghue et al. (2000b) were searching for new genes involved in heart failure and identified a human cDNA ACE homolog, named ACE2, among 19,000 5’end sequences by RACE (rapid amplification of cDNA ends) in the heart ventricle cDNA library, obtained from a woman with idiopathic dilated cardiomyopathy. |
T48 |
1188-1290 |
Sentence |
denotes |
ACE2 showed a transmembrane domain, a zinc catalytic domain 42% identical to ACE and a signal peptide. |
T49 |
1291-1348 |
Sentence |
denotes |
Like ACE, ACE2 seemed to be an ectoenzyme type I protein. |
T50 |
1349-1517 |
Sentence |
denotes |
The authors identified ACE2 transcripts quite exclusively in the heart and in the kidney, suggesting a role for ACE2 in the local RAAS control (Donoghue et al., 2000b). |
T51 |
1518-1657 |
Sentence |
denotes |
In the following years, ACE2 was intensively studied, its structure and function were enlightened, and tentative inhibitors were developed. |