PMID: 9931011

Ramjeesingh M, Li C, Garami E, Huan LJ, Galley K, Wang Y, Bear CE
Walker mutations reveal loose relationship between catalytic and channel-gating activities of purified CFTR (cystic fibrosis transmembrane conductance regulator).
Biochemistry. 1999 Feb 2;38(5):1463-8., 1999-02-02 [PubMed]
Sentences
No. Mutations Sentence Comment
16 ABCC7 p.Gly551Asp
X
ABCC7 p.Gly551Asp 9931011:16:96
status: NEW
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Furthermore, we found that a disease-causing mutation in the "signature" motif of NBF1, namely, G551D, abrogated this activity (11). Login to comment
21 ABCC7 p.Lys1250Ala
X
ABCC7 p.Lys1250Ala 9931011:21:130
status: NEW
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ABCC7 p.Lys1250Ala
X
ABCC7 p.Lys1250Ala 9931011:21:131
status: NEW
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ABCC7 p.Lys464Ala
X
ABCC7 p.Lys464Ala 9931011:21:33
status: NEW
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While it was determined that the K464A mutation abrogated ATPase activity of the CFTR-NBF1 fusion protein (15), the effect of the K1250A mutation in the context of the CFTR-NBF2 fusion protein is not known. Login to comment
32 ABCC7 p.Lys1250Ala
X
ABCC7 p.Lys1250Ala 9931011:32:137
status: NEW
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ABCC7 p.Lys464Ala
X
ABCC7 p.Lys464Ala 9931011:32:87
status: NEW
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A small cassette containing the specific mutation, i.e., a BspE1/SphI fragment for the K464A mutation or a Pm1I/Tth111I fragment for the K1250A mutation was subcloned into a new pBQ6.2 and then sequenced to confirm the introduction of the mutations. Login to comment
33 ABCC7 p.Lys1250Ala
X
ABCC7 p.Lys1250Ala 9931011:33:48
status: NEW
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ABCC7 p.Lys464Ala
X
ABCC7 p.Lys464Ala 9931011:33:12
status: NEW
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Ultimately, K464A (as an XbaI/SphI fragment) or K1250A (as a Pm1I/Tth111I fragment) was subcloned into pBlueBac4 (Invitrogen, Carlsbad, CA) for baculovirus expression. Login to comment
123 ABCC7 p.Lys1250Ala
X
ABCC7 p.Lys1250Ala 9931011:123:218
status: NEW
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ABCC7 p.Lys464Ala
X
ABCC7 p.Lys464Ala 9931011:123:208
status: NEW
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Disruption of the Chloride Channel ActiVity of the Intact Purified CFTR Protein by Mutation of the Walker A Lysine in either NBF1 or NBF2. We assessed the consequences of each of the Walker lysine mutations, K464A and K1250A, on the chloride channel activity of CFTR using two assays. Login to comment
166 ABCC7 p.Lys1250Ala
X
ABCC7 p.Lys1250Ala 9931011:166:29
status: NEW
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The double mutant, CFTRK464A/K1250A, also exhibits negligible catalytic activity, comparable to that of CFTRK1250A (data not shown), supporting our suggestion that the two Walker sites are not symmetrical. Login to comment