Id |
Subject |
Object |
Predicate |
Lexical cue |
T1 |
0-67 |
Sentence |
denotes |
Blockade of NFAT activation by the second calcineurin binding site. |
T2 |
68-178 |
Sentence |
denotes |
Activation of NFAT transcription factors requires their dephosphorylation by the phosphatase calcineurin (CN). |
T3 |
179-215 |
Sentence |
denotes |
NFATs contain two CN binding motifs: |
T4 |
216-261 |
Sentence |
denotes |
PxIxIT and CnBP-B/CNBR2 (which we call LxVP). |
T5 |
262-399 |
Sentence |
denotes |
Here we carry out a detailed comparative analysis of the CN binding activity displayed by the PxIxIT and LxVP sites from different NFATs. |
T6 |
400-554 |
Sentence |
denotes |
Dose-response CN binding experiments with GST fusion proteins of NFATc1 and NFATc2 showed that NFATc1 binds CN in vitro more efficiently than does NFATc2. |
T7 |
555-809 |
Sentence |
denotes |
This difference in binding appears to be caused by the different CN binding potencies of the corresponding LxVP sites; thus while the LxVPc2 peptide fused to GST did not bind CN, GST-LxVPc1 bound it more efficiently than did GST-PxIxITc1 or GST-PxIxITc2. |
T8 |
810-951 |
Sentence |
denotes |
Furthermore, an NFATc2 chimera protein containing the LxVP motif from NFATc1 interacted with CN much more potently than did wild-type NFATc2. |
T9 |
952-1098 |
Sentence |
denotes |
Free peptides spanning the LxVP motifs from NFATc1, c3 or c4 displaced CN from GST-NFATc1 and GST-NFATc2 more efficiently than any PxIxIT peptide. |
T10 |
1099-1202 |
Sentence |
denotes |
PxIxITc2 and LxVPc1 peptides were each able to cross-compete GST-LxVPc1-CN and GST-PxIxITc2-CN binding. |
T11 |
1203-1332 |
Sentence |
denotes |
In contrast with PxIxITc2, the LxVP peptide not only blocked CN-NFAT binding but also inhibited CN phosphatase activity in vitro. |
T12 |
1333-1428 |
Sentence |
denotes |
Furthermore, exogenous LxVPc1 blocked NFATc2 phosphorylation and nuclear translocation in vivo. |
T13 |
1429-1641 |
Sentence |
denotes |
These results suggest a model in which the different CN binding characteristics of the PxIxIT and LxVP sites enable different NFAT members to influence each others activities in cells where they are co-expressed. |