Abul Kalam Azad, Takayuki Ishikawa, Yoshihiro Sawa, Hajime Shibata
Programmed cell death (PCD) in petals provides a model system to study the molecular aspects of organ senescence. In this study, the very early triggering signal for PCD during the senescence process from young green buds to 14-d-old petals of Tulipa gesneriana was determined. The opening and closin...
Abul Kalam Azad, Maki Katsuhara, Yoshihiro Sawa, Takahiro Ishikawa et al.
We suggested previously that temperature-dependent tulip (Tulipa gesneriana) petal movement that is concomitant with water transport is regulated by reversible phosphorylation of an unidentified plasma membrane intrinsic protein (PIP). In this study, four full-length cDNAs of PIPs from tulip petals ...
Abul Kalam Azad, Naoki Yoshikawa, Takahiro Ishikawa, Yoshihiro Sawa et al.
Aquaporins are integral membrane proteins that facilitate the transport of water and some small solutes across cellular membranes. X-ray crystallography of aquaporins indicates that four amino acids constitute an aromatic/arginine (ar/R) pore constriction known as the selectivity filter. On the basi...
Abul Kalam Azad, Jahed Ahmed, Md. Asraful Alum, Md. Mahbub Hasan et al.
Major intrinsic proteins (MIPs), commonly known as aquaporins, transport not only water in plants but also other substrates of physiological significance and heavy metals. In most of the higher plants, MIPs are divided into five subfamilies (PIPs, TIPs, NIPs, SIPs and XIPs). Herein, we identified 68...
Abul Kalam Azad, Yoshihiro Sawa, Takahiro Ishikawa, Hajime Shibata
Abstract Temperature‐dependent tulip petal opening and closing movement was previously suggested to be regulated by reversible phosphorylation of a plasma membrane aquaporin ( Azad et al. , 2004 a ). Stomatal apertures of petals were investigated during petal opening at 20°C and closing at 5°C. In c...
Abul Kalam Azad, Yoshihiro Sawa, Takahiro Ishikawa, Hitoshi Shibata
Water channels formed by aquaporins (AQPs) play an important role in the control of water homeostasis in individual cells and in multicellular organisms. Plasma membrane intrinsic proteins (PIPs) constitute a subclass of plant AQPs. TgPIP2;1 and TgPIP2;2 from tulip petals are members of the PIP fami...
Jannatul Aklima, Takumi Onojima, Sawako Kimura, Kanji Umiuchi et al.
Reactive oxygen species (ROS) oxidize surrounding molecules and thus impair their functions. Since mitochondria are a major source of ROS, suppression of ROS overproduction in the mitochondria is important for cells. Spontaneous transient depolarization of individual mitochondria is a physiological ...
Hiroshi Hasegawa, Ismail M.M. Rahman, Yoshihiro Umehara, Hikaru Sawai et al.
The waste byproducts from the indium-consuming fabrication processes are considered as the viable resource for indium due to the unique preference to the element in designing optoelectronic devices. The present work introduces a new technique for the selective recovery of indium from the etching was...
Abul Kalam Azad, Jahed Ahmed, Md. Asraful Alum, Md. Mahbub Hasan et al.
Major intrinsic proteins (MIPs), commonly known as aquaporins, transport water and non-polar small solutes. Comparing the 3D models and the primary selectivity-related motifs (two Asn-Pro-Ala (NPA) regions, the aromatic/arginine (ar/R) selectivity filter, and Froger's positions (FPs)) of all plant M...
Abul Kalam Azad, Ryosuke Hanawa, Takahiro Ishikawa, Yoshihiro Sawa et al.
Previously, we have characterized two tonoplast intrinsic proteins (TIPs) and four plasma membrane intrinsic proteins (PIPs) from the 2-day-old petals of tulip (Tulipa gesneriana). In this study, we analyzed the development of tulip petals and stems, temperature-dependent petal movement, the amount ...
Abul Kalam Azad, Jahed Ahmed, Al Hakim, Md. Mahbub Hasan et al.
Background: Aquaporins, also known as major intrinsic proteins (MIPs), facilitate the membrane diffusion of water and some other small solutes. The roles of MIPs in plant physiological processes are established and now their roles in plant-pathogen interactions are getting more attention. Objective:...
Annie Kalonda, Ngonda Saasa, Masahiro Kajihara, Naganori Nao et al.
In recent years, the southern African region has experienced repeated incursions of highly pathogenic avian influenza viruses (HPAIVs), with wild migratory birds being implicated in the spread. To understand the profile of avian influenza viruses (AIVs) circulating in Zambia, we surveyed wild waterf...
Abul Kalam Azad, Md Asraful Jahan, Md. Mahbub Hasan, Takahiro Ishikawa et al.
The Sec61α subunit is the core subunit of the protein conducting channel which is required for protein translocation in eukaryotes and prokaryotes. In this study, we cloned a Sec61α subunit from Penicillium ochrochloron (PoSec61α). Sequence and 3D structural model analysis showed that PoSec61α conse...
Jannatul Aklima, Sawaros Onchaiya, Tomonori Saotome, Punitha Velmurugan et al.
Protein quality control is essential for cellular homeostasis. In this study, we examined the effect of improperly folded proteins that do not form amyloid fibrils on mitochondria, which play important roles in ATP production and cell death. First, we prepared domain 3 of the dengue envelope protein...
Abul Kalam Azad, Jahed Ahmed, Al Hakim, Md. Mahbub Hasan et al.
ABSTRACT Major intrinsic proteins (MIPs), commonly known as aquaporins, facilitate the membrane diffusion of water and some other non- polar solutes. MIPs might be involved in host-pathogen interactions. Herein, we identified 17, 24, 27, 19, 19, and 22 full-length MIPs, respectively, in the genomes ...