PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 9390185-2 1997 Here, we study the accessibility of the fluorescein covalently attached to the Lys515 at the nucleotide binding domain of the ATPase to the small collisional quencher iodide at pH 6 and 8, as well as the effect of ligand binding (La3+, La(3+)-nucleotide, and Ca2+). lanthanum(3+) 230-234 dynein axonemal heavy chain 8 Homo sapiens 126-132 9390185-6 1997 Taken together, these findings show the presence of structural flexibility in the FITC binding site and suggest a structural modulation of the Ca(2+)-ATPase nucleotide binding domain by pH and La3+ binding through long-range link-age mechanisms. lanthanum(3+) 193-197 dynein axonemal heavy chain 8 Homo sapiens 150-156 691040-6 1978 In other experiments, the use of La3+ to inhibit the Ca2+-pump allowed an estimate of the ATPase activity associated with Ca2+ extrusion. lanthanum(3+) 33-37 dynein axonemal heavy chain 8 Homo sapiens 90-96