Electrochemical Biosensor for Naphthalene Acetic Acid in Fruits and Vegetables Based on Lipid Films with Incorporated Auxin-binding Protein Receptor Using Graphene Electrodes

2016 ◽  
Vol 28 (9) ◽  
pp. 2171-2177 ◽  
Author(s):  
Spyridoula Bratakou ◽  
Georgia-Paraskevi Nikoleli ◽  
Christina G. Siontorou ◽  
Stephanos Karapetis ◽  
Dimitrios P. Nikolelis ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Fruits And Vegetables ◽  
Electrochemical Biosensor ◽  
Binding Protein ◽  
Naphthalene Acetic Acid ◽  
Protein Receptor ◽  
Lipid Films ◽  
Auxin Binding ◽  
Auxin Binding Protein

An Auxin Binding Protein is Localized in the Symbiosome Membrane of Soybean Nodules

1993 ◽  
Vol 48 (1-2) ◽  
pp. 35-40 ◽  
Author(s):  
Andreas Jacobi ◽  
Rolf Zettl ◽  
Klaus Palme ◽  
Dietrich Werner
Keyword(s):  
Acetic Acid ◽  
Auxin Transport ◽  
Binding Protein ◽  
Naphthaleneacetic Acid ◽  
Dependent Manner ◽  
Symbiosome Membrane ◽  
Auxin Binding ◽  
Auxin Binding Protein ◽  
Triton X ◽  
Indole 3 Acetic Acid

Binding of tritiated indole-3-acetic acid ([3H]IAA) to symbiosome membranes of soybean nodules occurred in a protein-dependent manner and was competitively inhibited by unlabeled indole-3-acetic acid (IAA), 1-naphthaleneacetic acid (1-NAA) and dithiothreitol (DTT), but not by tryptophan and benzoic acid. The symbiosome membranes bound IAA with a KD of 1 × 10-6 m. Photoaffinity labeling identified an auxin-binding protein (ABP) in the symbiosome membrane with an apparent molecular mass of 23 kDa. This 23 kDa protein was labeled either with 5-azido-[7-3H]indole-3-acetic acid ([3H]N3IAA) or with 5′-azido-[3,6-3H2]-1-naphthylphthalamic acid ([3H2]N3NPA). Labeling of the 23 kDa protein with [3H]N3IAA was competitively inhibited by unlabeled IAA and 1-NAA. NPA and quercetin, inhibitors of polar auxin transport, as well as rutin, a glycosylated derivative of quercetin, competed with IAA for binding. Conversely, [3H2]N3NPA labeling was inhibited by unlabeled IAA and NPA. The 23 kDa symbiosome membrane protein was partially solubilized with Triton X-100 and nearly completely using Triton X-114. The observation that auxin transport inhibitors compete with IAA for binding suggests that the symbiosome membrane ABP could be part of an auxin efflux carrier system required to control the auxin concentration in infected soybean nodule cells.

scholarly journals A Soluble Auxin-Binding Protein from Hyoscyamus muticus Is a Glutathione S-Transferase

1993 ◽  
Vol 102 (1) ◽  
pp. 29-34 ◽  
Author(s):  
J. Bilang ◽  
H. Macdonald ◽  
P. J. King ◽  
A. Sturm
Keyword(s):  
Binding Protein ◽  
Hyoscyamus Muticus ◽  
Glutathione S Transferase ◽  
Auxin Binding ◽  
Auxin Binding Protein

scholarly journals In silico promoter and expression analyses of rice Auxin Binding Protein 57 (ABP57)

2021 ◽  
Vol 8 (3) ◽  
pp. 741-748
Author(s):  
Farah Afiqah Baharuddin ◽  
Zhan Xuan Khong ◽  
Zamri Zainal ◽  
Noor Liyana Sukiran
Keyword(s):  
Abiotic Stress ◽  
In Silico ◽  
Binding Protein ◽  
Transcript Level ◽  
Regulatory Elements ◽  
Biochemical Properties ◽  
Auxin Receptor ◽  
Reverse Transcription Pcr ◽  
Auxin Binding ◽  
Auxin Binding Protein

Auxin Binding Protein 57 (ABP57) is one of the molecular components involved in rice response to abiotic stress. The ABP57 gene encodes an auxin receptor which functions in activating the plasma membrane H+-ATPase. Biochemical properties of ABP57 have been characterized; however, the function of ABP57, particularly on stress and hormone responses is still limited. This study was conducted to understand the regulation of ABP57 expression under abiotic stress. Thus, in silico identification of cis-acting regulatory elements (CAREs) in the promoter region of ABP57 was performed. Several motifs and transcription factor binding site (TFBS) that are involved in abiotic stress such as ABRE, DRE, AP2/EREBP, WRKY and NAC were identified. Next, expression analysis of ABP57 under drought, salt, auxin (IAA) and abscisic acid (ABA) was conducted by reverse transcription-PCR (RT-PCR) to verify the effect of these treatments on ABP57 transcript level. ABP57 was expressed at different levels in the shoot and root under drought conditions, and its expression was increased under IAA and ABA treatments. Moreover, our results showed that ABP57 expression in the root was more responsive to drought, auxin and ABA treatments compared to its transcript in the shoot. This finding suggests that ABP57 is a drought-responsive gene and possibly regulated by IAA and ABA.

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