• Title/Summary/Keyword: Silk gland

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Cloning of the Bombyx mori short neuropeptide F receptor (BsNPF-R) cDNA (누에 short neuropeptide F receptor (BsNPF-R)의 cDNA cloning)

  • Shin, Hyojung;Kwon, Kisang;Hong, Sun Mee;Kim, Hong Geun;Park, Kwan-Ho;Choi, Ji-Young;Kim, Seung-Whan;Yu, Kweon;Kwon, O-Yu
    • Journal of Life Science
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    • v.26 no.6
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    • pp.721-726
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    • 2016
  • It has already been reported that short neuropeptide F (sNPF) stimulates feeding behaviors in a wide variety of insect species. In the present study, we cloned cDNA, encoding a sNPF receptor homologue from a silkworm, Bombyx mori, named BsNPF-R. The amino acid sequence of BsNPF-R was compared with those of sNPF-R thus far reported, which is shared with humans (36%), mice (34%), zebrafish (35%), and fruit flies (51%), respectively. A BsNPF-R protein’s mass was theoretically estimated to be 42,731 Da and it is a putative plasma membrane-penetrating protein. The mRNA expression of BsNPF-R was tested; the results showed that a strong expression was detected at the midgut, post-silk gland, Malpighian, and testis; however, a weak expression was at the fat body, hemocyte, and ovary. In addition, the synthesized sNPF of a silkworm regulated the BsNPF-R mRNA expression through the cell-based functional analysis.

Studies on the Rearing with Artificial Diet in the Silkworm, Bombyx mori L. -Electrophoretic Sepatarion of Esterase or Phosphatase along the Growth of Larvae- (가잠의 인공사료육에 관한 연구 -유충발육에 따른 Esterase 및 Phosphatase의 전기영동상-)

  • 김주읍
    • Journal of Sericultural and Entomological Science
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    • v.21 no.1
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    • pp.21-28
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    • 1979
  • The Electrophoretic separation in agarose gel on the esterase and acid phosphatase of blood, midgut and silk gland was carried out with 2 original variginal varieties and 7 F$_1$ hybrids. 1. The midgut of larvae fed on mulberry leaves showed one or two more esterase bands than that of larvae fed on artificial diet. 2. The midgut of C 15 larvae being excellently respondent to artificial diet showed one or two more esterase bands than that of larvae being bad respondent to artificial diet. 3. Electrophoretic separation of esterase bands appeared to be greatly different among newly hatched larvae, 1st and 2nd install larvae of F$_1$hybrids. However the difference among the silkworm varieties was not recognized. 4. According to the change in rearing temperature, the number of the active band of midgut esterase was varied. At the temperature of 28$^{\circ}C$ 5 active esterase bands were found. At temperature of 35$^{\circ}C$ 4 bands were noted at 3rd install and 6 or 7 bands at 4th instar. 5. No similar esterase bands conld be found among midgut, blood and silkgland. There are five esterase bands in the midgut, one in blood and three in silkgland. 6. There was rather small difference in acid phosphatase types of midgut and blood according to varieties and rearing temperature. No active band was shown in silkgland. In midgut, there was one acid phosphatase band at 3rd install, two at 4th instar and three at 5th instar. In blood, One active band at 3rd or 4th instar and three bands at 5th inatar were detected.

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Studies on the RNA nucleotide composition of egg, worm body, pupa and silk-gland(posterior) of Bombyx mori, and spinning gland of spider (가잠(家蠶)의 충체(蟲體), 용체, 잠란(蠶卵) 및 견사선(絹絲腺)(후부(後部))과 지주(蜘蛛) 방적선(紡績腺) RNA의 nucleotide 조성(組成)에 관(關)한 연구(硏究))

  • Kim, Hyeong-Su
    • Applied Biological Chemistry
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    • v.5
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    • pp.7-21
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    • 1964
  • 가잠(家蠶)(Bombyx mori)의 잠체(蠶體), 용체 및 견사선(絹絲腺)(후부(後部))에서 phenol법(法)으로 RNA를 추출(抽出)하여 RNA의 nucleotide 조성(組成)(mole ratio)을 살피는 한편, 견사선(絹絲腺)(후부(後部))에서 초원심법(超遠沈法)으로 r-RNA, s-RNA를 분리(分離)하여 이에 대(對)한 nucleotide조성(組成)을 조사(調査)하고 또 가잠견사선(家蠶絹絲腺)과 비교(比較)할 목적(目的)으로 거미 방적선(紡績腺)의 t-RNA를 분리(分離)하여 nucleotide성분(成分)을 측정(測定)하여 다음과 같은 결과(結果)를 얻었다. 1) 잠란(蠶卵)에 있어서 이것을 마수(磨粹), 탈지(脫脂) 후(後) lysozyme을 작용(作用)시키고 10% NaCl용액(溶液)으로 가열(加熱) 추출(抽出)하는 새방법(方法)을 고찰(考察)하여 RNA의 추출(抽出)이 극난(極難)한 잠란(蠶卵)에서 RNA를 분리(分離)하는데 성공(成功)하였다. 2) 가잠란(家蠶卵), 잠체(蠶體), 용체 및 견사선(絹絲腺)(후부(後部))의 t-RNA nucleotide 조성(組成)은 다음과 같다. 시료(試料) $\frac{G+C}{A+U}$ $\frac{G+U}{A+C}$ $\frac{Pu}{Py}$ 가잠란(家蠶卵)의 RNA 1.14 1.24 0.99 가잠체(家蠶體)의 RNA 1.40 1.36 0.80 용체의 RNA 1.40 1.33 1.35 후부견사선(後部絹絲腺)의 RNA 1.05 1.32 1.15 이로서 잠체(蠶體). 용체 및 견사선(絹絲腺)의 Pu/Py는 각각(各各) 차이(差異)가 있으나 G+U/A+C는 3자간(者間)에 1.3의 거이 동일(同一)한 수치(數値)를 보여주고 있다. G+C/A+U는 잠체(蠶體)와 용체에 있어서 동일(同一)하나 견사선(絹絲腺)의 그것과는 차이(差異)가 있다. 한편 잠란(蠶卵)에 있어서는 Pu/Py, G+C/A+U, G+U/A+C가 각각(各各) 잠체(蠶體), 용체 및 견사선(絹絲腺)에 있어서와 현저(顯著)한 차이(差異)를 보여주고 있다. G+C/A+U가 1.3이나 되는 RNA의 base ratio를 가진 생물(生物)에 관(關)해서는 아직 보고(報告)된 바 없고 다만 본논문(本論文)의 가잠(家蠶)에 관(關)한 RNA와 속편(續編)인 각종(各種) 패류(貝類) RNA의 nucleotide 조성(組成)에서 모두 1.3에 가까운 수치(數値)를 보여주고 있다. 3) 견사선(絹絲腺)(후부(後部)) t-RNA와 거미 방적선(紡績腺)의 t-RNA의 nucleotide molar ratio 및 견사선(絹絲腺)의 r-RNA, s-RNA nucleotide 조성(組成)은 다음과 같다. 재료(材料) $\frac{G+C}{A+U}$ $\frac{G+U}{A+C}$ $\frac{Pu}{Py}$ 가잠견사선(家蠶絹絲腺)(후부(後部)의 t-RNA 1.05 1.32 1.15의 r-RNA 1.12 1.30 1.20의 s-RNA 1.55 1.33 0.65 지주방적선(蜘蛛紡績腺)의 t-RNA 1.35 1.24 1.16 즉(卽) 가잠견사선(家蠶絹絲腺)(후부(後部))과 거미방적선(紡績腺)의 t-RNA nucleotide 조성(組成)은 Pu/Py가 1.15와 1.16으로서 거이 동일(同一)하지만 G+C/A+U, G+U/A+C에 차이(差異)가 있음을 보았다. 한편 가잠견사선(家蠶絹絲腺)(후부(後部)) r-RNA와 s-RNA의 Pu/Py와 G+C/A+U는 현저(顯著)한 차이(差異)가 있고, G+U/A+C에 있어서는 1.3으로서 거이 동일(同一)한 수치(數値)를 보여주고 있다. 4. 이상(以上)과 같이 잠체(蠶體)에 관(關)한 RNA의 nucleotide 조성(組成)은 소위(所謂) GC-type로서, 현재(現在)까지 문헌(文獻)에 보고(報告)된 각종(各種) 생물(生物)의 RNA의 base ratio에 관(關)하여 비교(比較) 검토(檢討)하였으며, RNA의 nucleotide ratio의 차이(差異)의 의의(意義)에 대(對)하여 고찰(考察)하였다.

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