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(1)Vol.2014-BIO-40 No.6 2014/12/18. ᝟ሗฎ⌮Ꮫ఍◊✲ሗ࿌ IPSJ SIG Technical Report. ᱁Ꮚࣔࢹࣝࢆ⏝࠸ࡓࢱࣥࣃࢡ㉁จ㞟ࡢࢩ࣑࣮ࣗࣞࢩࣙࣥ 㕥ᮌᾴ♸ †1  㯮⏣⿱ †1 ᴫせ㸸ィ⟬ᶵࢆ⏝࠸࡚ࢱࣥࣃࢡ㉁ࡢจ㞟ࢆࢩ࣑࣮ࣗࣞࢺࡍࡿ◊✲ࡀ㏆ᖺὀ┠ࡉࢀ࡚࠸ࡿࠋࡑࡢࡼ࠺࡞ィ⟬ࢆ⾜࠺฼Ⅼ ࡣࠊจ㞟యࡢ≧ែࡸ㑄⛣㐣⛬ࢆᐇ㦂ᡭἲࡼࡾࡶヲ⣽࡟ほᐹ࡛ࡁࡿࡇ࡜࡛࠶ࡿࡀࠊศᏊືຊᏛࢩ࣑࣮ࣗࣞࢩࣙࣥ࡞࡝ࡢ ᚑ᮶ࡢᡭἲ࡛ࡣィ⟬࡟኱ኚ࡞᫬㛫ࡀ࠿࠿ࡿ࡜࠸࠺ၥ㢟ࡶ࠶ࡿࠋᮏ◊✲࡛ࡣィ⟬᫬㛫ࡢ▷⦰࡜⺮ⓑ㉁จ㞟ࡢ≀⌮໬Ꮫⓗ ゎ᫂ࢆ┠ⓗ࡜ࡋࠊ༢⣧࡞᱁Ꮚࣔࢹ࡛ࣝࣔࣥࢸ࢝ࣝࣟἲࢆ⏝࠸ࡓจ㞟ࡢࢩ࣑࣮ࣗࣞࢩࣙࣥࢆᐇ᪋ࡋࡓࠋࢩ࣑࣮ࣗࣞࢩࣙ ࡛ࣥࡣࠊࢱࣥࣃࢡ㉁࡜⪃࠼ࡿ⢏Ꮚࢆࠊ❧᪉యࡢ᱁Ꮚୖ࡛⛣ືࡉࡏࠊࡑࡢ㐠ື࡜఍ྜ≧ែࢆㄪ࡭ࡓࠋ㞄ࡾྜ࠺⢏Ꮚࡢሢ ࢆ୍ࡘࡢࢡࣛࢫࢱ࡜ࡋ࡚ᤊ࠼ࠊ ᗘࡸ⃰ᗘ࡞࡝ࢩ࣑࣮ࣗࣞࢩࣙࣥ᮲௳ࠊ⢏Ꮚ⛣ືࡢ࢔ࣝࢦࣜࢬ࣒ࡢ㐪࠸࡟ࡼࡿจ㞟య ࡢ᭷↓࡜ࡑࡢኚ໬ࢆㄪ࡭ࡓࠋࡑࢀࡽࡢ⤖ᯝ࠿ࡽࠊᮏࢩ࣑࣮ࣗࣞࢩࣙࣥᡭἲࡢᛶ㉁ࠊࡲࡓᐇ㝿ࡢィ⟬᫬㛫ࡸࡑࡢ฼⏝᪉ ἲ࡟࡟ࡘ࠸࡚ሗ࿌ࡍࡿࠋ. 1. ࡣࡌࡵ࡟ ࢱࣥࣃࢡ㉁ࡢจ㞟ࡣࠊᇶ♏◊✲࠿ࡽᕤᏛⓗᛂ⏝ࡲ࡛ᖜᗈ ࠸㡿ᇦ࡛ၥ㢟࡜࡞ࡿࠋ㐣ཤࡢ◊✲࡛ࡣࠊᵝࠎ࡞ᐇ㦂᪉ἲ࡛ จ㞟ࡢ࣓࢝ࢽࢬ࣒ࢆゎ᫂ࡍࡿヨࡳࡀ⾜ࢃࢀ࡚ࡁࡓࠋࡋ࠿ࡋࠊ. ⛣ືࡢ᪉ྥࡣࠊ⛣ືࡋ࡞࠸ሙྜࢆྵࡵ 7 ㏻ࡾࡢ୰࠿ࡽࣛࣥ ࢲ࣒࡟Ỵᐃࡋࠊ1 ᱁ᏊⅬ⛣ືࡉࡏࡓࠋࡲࡓࠊ᪤࡟⢏ᏊࡀᏑ ᅾࡍࡿ᱁ᏊⅬ࡟ࡣ⛣ືࡋ࡞࠸ࡶࡢ࡜ࡋࡓࠋ ⢏Ꮚࡈ࡜ࡢ⛣ື ࣛࣥࢲ࣒࡟㑅ࢇࡔ୍⢏Ꮚࢆ⛣ືࡉࡏࡓࠋ. ୍⯡ⓗ࡟ࢱࣥࣃࢡ㉁ࡢจ㞟ࡣࡑࡢ✀㢮ࡸ᮲௳࡟ࡼࡗ࡚ᕥྑ. ࢡࣛࢫࢱࡈ࡜ࡢ⛣ື. ࡉࢀࡿࡓࡵࠊᐇ㦂ⓗ࡞࢔ࣉ࣮ࣟࢳࡣከ኱࡞ࢥࢫࢺࡀ࠿࠿ࡿࠋ.  㞄᥋ࡋ࡚࠸ࡿ⢏Ꮚࡢሢࢆࡍ࡭࡚ࢡࣛࢫࢱ࡜ࡋࠊࣛࣥࢲ࣒. ࡑࢀ࡟ᑐࡋࠊィ⟬ᡭἲࢆ⏝࠸ࡓ◊✲ࡣᐇ㦂࡜ẚ࡭࡚ࢥࢫ. ࡟㑅ࢇࡔ୍ࢡࣛࢫࢱࠊࡲࡓࡣ୍⢏Ꮚࢆࣛࣥࢲ࣒࡞᪉ྥ࡟⛣. ࢺࡀ࠿࠿ࡽ࡞࠸࡜࠸࠺฼Ⅼࡀ࠶ࡿࠋࡲࡓࠊࢩ࣑࣮ࣗࣞࢩࣙ. ືࡉࡏࡓࠋ. ࣥࢆ⏝࠸ࡿࡇ࡜࡛จ㞟ࡢ㐠ືࡸ఍ྜ≧ែࢆヲ⣽࡟㆟ㄽࡍࡿ ࡇ࡜ࡀྍ⬟࡜࡞ࡿࠋ୰࡛ࡶ᭱ࡶ㢖⦾࡟⏝࠸ࡽࢀ࡚࠸ࡿࡶࡢ ࡣࠊศᏊືຊᏛࢩ࣑࣮ࣗࣞࢩ࡛ࣙࣥ࠶ࡿࡀࠊࡇࢀࡣ⢭ᐦ࡞ ィ⟬ࢆ⾜࠼ࡿ཯㠃ࠊⳘ኱࡞ィ⟬᫬㛫ࡀ࠿࠿ࡗ࡚ࡋࡲ࠺ࠋࡑ ࡢࡓࡵࠊศᏊືຊᏛࢩ࣑࣮ࣗࣞࢩ࡛ࣙࣥจ㞟ࢆㄪ࡭ࡿሙྜࠊ 」ᩘࡢᑠࡉ࡞࣌ࣉࢳࢻࡀ⏝࠸ࡽࢀࡿ [1, 2]ࠋ ィ⟬᫬㛫ࡢᑡ࡞࠸ࢩ࣑࣮ࣗࣞࢩ࡛ࣙࣥࠊ」ᩘࡢࢱࣥࣃࢡ. ᅗ 1 ⢏Ꮚ⛣ືࡢ౛. ㉁ࢆᢅ࠺ᡭἲ࡜ࡋ࡚ࠊ᱁Ꮚୖࡢࡳ࡛ศᏊࢆື࠿ࡍ᱁Ꮚࣔࢹ. 2.3 ࢚ࢿࣝࢠ࣮. ࣝࡀᏑᅾࡍࡿ [3, 4]ࠋࡇࡢ᱁Ꮚࣔࢹࣝࡣ୍⯡ⓗ࡟ࢱࣥࣃࢡ.  ྛ≧ែ࡛⣔඲యࡢ࢚ࢿࣝࢠ࣮ࡣ௨ୗࡢࡼ࠺࡟࡞ࡿࠋ. ㉁ࡢ࢔࣑ࣀ㓟ṧᇶࢆྛ᱁ᏊⅬ࡟㓄⨨ࡋᢡࡾࡓࡓࡳ࡟↔Ⅼࢆ ࠶࡚ࡿࡇ࡜ࡀከࡃࠊከᩘࡢࢱࣥࣃࢡ㉁㛫ࡢ┦஫స⏝ࡸจ㞟. ‫்ܧ‬௢௧௔௟ = ෍ ‫ܥ‬௜௝ ߝ ௜௝. ࡟ὀ┠ࡋࡓ◊✲ࡣᑡ࡞࠸ࠋ.  C ij ࡣࢱࣥࣃࢡ㉁⢏Ꮚ i, j ࡀ㞄᥋ࡋ࡚࠸ࡓሙྜ 1ࠊ㞄᥋.  ࡑࡇ࡛ᮏ◊✲࡛ࡣࠊࢱࣥࣃࢡ㉁ࡢจ㞟ࢆ෌⌧࣭ほᐹࡍࡿ. ࡋ࡚࠸࡞࠸ሙྜ 0 ࡜࡞ࡿࠋũ ࡣࢱࣥࣃࢡ㉁㛫࡟⏕ࡌࡿ࢚. ࡇ࡜ࢆ┠ⓗ࡜ࡋࠊ୍⢏Ꮚࢆ࢔࣑ࣀ㓟࡛ࡣ࡞ࡃࢱࣥࣃࢡ㉁࡜. ࢿࣝࢠ࣮࡛࠶ࡾ-100࡜ࡋࡓࠋࡇࡢ࢚ࢿࣝࢠ࣮ࡣ㏆㊥㞳㛫. ᝿ᐃࡋࡓࢩ࣑࣮ࣗࣞࢩࣙࣥࢆ⾜ࡗࡓࠋ. ࡢᘬຊࢆ᝿ᐃࡋ࡚࠸ࡿࠋ. 2. ᡭἲ. 2.4 ࣓ࢺ࣏ࣟࣜࢫἲ. 2.1 ࢩ࣑࣮ࣗࣞࢩࣙࣥ᮲௳ ࿘ᮇቃ⏺᮲௳ࢆ㐺⏝ࡋࡓ୍㎶ 30 ࡢ❧᪉᱁Ꮚ୰࡟ࠊࣛࣥ ࢲ࣒࡟୍ᐃᩘ⢏Ꮚࢆ㓄⨨ࡋࡓ≧ែࢆึᮇ≧ែ࡜ࡋࡓࠋ⢏Ꮚ ᩘࡣ࠸ࡃࡘ࠿ࡢ᮲௳࡛ࢩ࣑࣮ࣗࣞࢩࣙࣥࢆ⾜ࡗࡓࡀࠊྛࢩ ࣑࣮ࣗࣞࢩࣙࣥෆ࡛ࡣࡑࢀࡒࢀ୍ᐃ࡟ಖࡗࡓࠋࡲࡓࠊ⣔ࡢ ⃰ᗘࡣ⢏Ꮚᩘࢆ඲᱁ᏊⅬ࡛๭ࡗࡓ್࡜ࡋࡓࠋ 2.2 ⢏Ꮚࡢ⛣ື  ⢏Ꮚࡢ⛣ື࡟ࡣ௨ୗࡢ஧㏻ࡾࡢ᪉ἲࢆ⏝࠸ࡓࠋྛ⢏Ꮚࡢ.  ྛ≧ែ㛫ࡢ㑄⛣ࡣ࣓ࢺ࣏ࣟࣜࢫἲࡢ㑄⛣☜⋡ࡢᘧࢆ⏝࠸ ࡚⾜ࡗࡓࠋ P = min{1, exp[െȾ (‫ܧ‬௡௘௪ െ ‫ܧ‬௢௟ௗ )]}  E new , E old ࡣࡑࢀࡒࢀ⢏Ꮚࢆ⛣ືࡉࡏࡓ๓ᚋ࡛ࡢ⥲࢚ࢿ ࣝࢠ࣮࡛࠶ࡿࠋșࡣ㏫ ᗘ࡛࠶ࡿࠋୖグࡢ☜⋡࡟ࡼࡗ࡚⢏ Ꮚ⛣ືࢆ⤊࠼ࡓ≧ែࡢ᥇ᢥࢆ⾜࠺ࠋࢩ࣑࣮ࣗࣞࢩࣙࣥࡢྛ ࢫࢸࢵࣉࡣࠊ⢏Ꮚࡢ⛣ືࠊ࢚ࢿࣝࢠ࣮ィ⟬ࠊ㑄⛣☜⋡࡟ࡼ ࡿุᐃࡢ㡰࡟⾜࠺ࠋ. †1 ᮾி㎰ᕤ኱Ꮫ ᕤᏛᗓ ⏕࿨ᕤᏛᑓᨷ  Dept of Biotech. & Life Sci., Tokyo University of Agriculture & Technology. ⓒ 2014 Information Processing Society of Japan. 1.

(2) Vol.2014-BIO-40 No.6 2014/12/18. ᝟ሗฎ⌮Ꮫ఍◊✲ሗ࿌ IPSJ SIG Technical Report. 3. ⤖ᯝ 3.1 ⃰ᗘࠊ ᗘ࡟ࡼࡿኚ໬ ྛ⃰ᗘࠊ ᗘ࡛ࡢࢩ࣑࣮ࣗࣞࢩࣙࣥࡢ⤖ᯝࢆ♧ࡍࠋィ⟬ ࡣ࢚ࢿࣝࢠ࣮ࡀᖹ⾮࡟㐩ࡍࡿࡲ࡛⾜ࡗ࡚࠾ࡾࠊྠ᮲௳࡛ 3 ᅇ⾜ࡗࡓ࡜ࡁࡢᖹᆒ್ࢆ⟬ฟࡋࡓࠋࡲࡎࠊ⢏Ꮚࡈ࡜ࡢ⛣ື ࡢ⤖ᯝࢆ♧ࡍ㸦ᅗ 2㸧ࠋ⢏Ꮚࡈ࡜ࡢ⛣ື࡛ࡣࠊ ᗘ࡟ࡼࡿࣔ ࣀ࣐࣮⋡ࡢኚ໬ࡀ኱ࡁࡃࠊ ᗘࡢపୗ㸦㏫ ᗘࡢୖ᪼㸧࡟ క࠸ࣔࣀ࣐࣮⋡ࡶపୗࡋࡓࠋࡲࡓࠊ⃰ᗘࡀ㧗ࡃ࡞ࡿ࡜ࡑࡢ ศࣔࣀ࣐࣮⋡ࡢపୗࡶ኱ࡁࡃ࡞ࡗࡓࠋ. 3.2 ⢏Ꮚࡢ⛣ື᪉ἲ࡟ࡼࡿኚ໬ ⢏Ꮚࡢ⛣ື᪉ἲ࡟ࡼࡗ࡚ࠊᙧᡂࡉࢀࡓจ㞟యࡢࢧ࢖ࢬࡀ ኱ࡁࡃ␗࡞ࡗࡓࠋ⃰ᗘ 0.5%ࠊ㏫ ᗘ 0.05 ࡛ࡢ᭱⤊≧ែࡢ ᖹᆒࢡࣛࢫࢱࢧ࢖ࢬࡣࠊ⢏Ꮚࡈ࡜ࡢ⛣ື࡛ࡣ 11.7ࠊࢡࣛࢫ ࢱࡈ࡜ࡢ⛣ື࡛ࡣ 76.0 ࡜࡞ࡗࡓࠋࡇࢀࡣࠊࢡࣛࢫࢱࡈ࡜ ࡢ⛣ືࡢሙྜ࡟ࡣࢡࣛࢫࢱࡢゎ㞳ࡀ㉳ࡇࡽ࡞࠸ࡓࡵ࡛࠶ࡿࠋ 3.3 ィ⟬㏿ᗘ  ᮏᡭἲ࡛ࡣࠊ2.13 GHz ࡢ CPU 1 ࢥ࢔ࢆ⏝࠸ィ⟬ࢆ⾜ࡗ ࡓࠋࡍ࡭࡚ࡢィ⟬᮲௳ࡢ࠺ࡕࠊ⢏Ꮚࡈ࡜ࡢ⛣ື࡛ࡣ᭱▷ 16 ⛊ࠊ᭱㛗 14 ศࠊࢡࣛࢫࢱࡈ࡜ࡢ⛣ື࡛ࡣ᭱▷ 50 ⛊ࠊ᭱ 㛗 97 ศ࡛࠶ࡗࡓࠋィ⟬᫬㛫ࡣ⣔ࡢ୰࡟Ꮡᅾࡍࡿ⢏Ꮚᩘࡢ ቑຍ࡟క࠸ቑຍࡍࡿࠋࢡࣛࢫࢱࡈ࡜ࡢ⛣ືࡢሙྜࡣྛࢫࢸ ࢵࣉ࡛ࢡࣛࢫࢱࡢุᐃࢆ⾜࠺ࡓࡵࠊ⃰ᗘࡢ㧗࠸⣔࡛ࡣ≉࡟ ィ⟬᫬㛫ࡀ㛗࠿ࡗࡓࠋࡋ࠿ࡋࠊࡑࡢ௚ࡢจ㞟ࡢ᱁Ꮚࣔࢹࣝ ࢩ࣑࣮ࣗࣞࢩࣙࣥࡢィ⟬᫬㛫ࡣ 1~20 ᫬㛫࡛࠶ࡿࡇ࡜࠿ ࡽࠊᮏᡭἲࡀẚ㍑ⓗ㧗㏿࡞ࢩ࣑࣮ࣗࣞࢩ࡛ࣙࣥ࠶ࡿࡇ࡜ࡀ ࢃ࠿ࡿ [4]ࠋ. 4. ࠾ࢃࡾ࡟  ᱁Ꮚࣔࢹࣝ࡜࣓ࢺ࣏ࣟࣜࢫἲࢆ⏝࠸ࡓ㧗㏿࡞จ㞟ࢩ࣑ࣗ ᅗ 2  ᗘ࡟ࡼࡿࣔࣀ࣐࣮⋡ࡢኚ໬㸦⢏Ꮚࡈ࡜㸧  ḟ࡟ࠊࢡࣛࢫࢱࡈ࡜ࡢ⛣ືࡢ⤖ᯝࢆ♧ࡍࠋᅗ 2 ࡜ྠᵝࡢ ⃰ᗘࠊ ᗘࡢ᮲௳࡛ࠊࢡࣛࢫࢱࡈ࡜ࡢ⛣ືࢆ⏝࠸࡚ィ⟬ࢆ ⾜ࡗࡓࠋࡓࡔࡋࠊࢩ࣑࣮ࣗࣞࢩࣙࣥࡢࢫࢸࢵࣉᩘࡣ 20,000 ࡟ᅛᐃࡋࡓࠋྛ᮲௳࡛ᅄ㔞య௨ୖࡢ࢜ࣜࢦ࣐࣮ࢆᙧᡂࡋ࡚ ࠸ࡿࢡࣛࢫࢱࡢ๭ྜࢆ⟬ฟࡋࡓ㸦ᅗ 3㸧ࠋ⦪㍈ࡣ࢜ࣜࢦ࣐࣮ ࡟ᒓࡍࡿ⢏Ꮚࡢ๭ྜ࡛࠶ࡿࠋࢡࣛࢫࢱࡈ࡜ࡢ⛣ືࡢሙྜ࡟ ࡣࠊ⢏Ꮚࡈ࡜ࡢ⛣ືࡢሙྜ࡜␗࡞ࡾ ᗘ࡟ࡼࡿኚ໬ࡀ࡯࡜ ࢇ࡝ぢࡽࢀ࡞࠿ࡗࡓࠋࡲࡓࠊ⃰ᗘ 0.1% ࡟㛵ࡋ࡚ࡣ⢏Ꮚᩘ ࡀᑡ࡞࠸ࡓࡵ࡟࢜ࣜࢦ࣐࣮⋡ࡢㄗᕪࡀ኱ࡁࡃ࡞ࡗ࡚࠸ࡿࡀࠊ ⃰ᗘࡀୖࡀࡿࡇ࡜࡛࢜ࣜࢦ࣐࣮ࡀቑ࠼࡚࠸ࡿࡇ࡜ࡀࢃ࠿ࡿࠋ. ࣮ࣞࢩࣙࣥࢆ㛤Ⓨࡋࡓࠋࡲࡓࠊ ᗘࠊ⃰ᗘࠊ⢏Ꮚࡢ⛣ືἲ ࡟ࡼࡾࣔࣀ࣐࣮ᩘࡸจ㞟యࡢࢧ࢖ࢬ࡟㐪࠸ࡀ࠶ࡿࡇ࡜ࡀࢃ ࠿ࡗࡓࠋ⌧᫬Ⅼ࡛ࡣࡇࢀࡽࡢ⤖ᯝ࡜ࠊ⌧ᐇࡢࢱࣥࣃࢡ㉁ࡢ 㛫ࡢ┦㐪Ⅼ࡞࡝࡟ࡘ࠸࡚㆟ㄽࠊ᳨ドࡀ୙༑ศ࡞ࡓࡵࠊ௒ᚋ ࡣࡑࡢⅬࢆ㋃ࡲ࠼࡚ࢩ࣑࣮ࣗࣞࢩࣙࣥࡢᨵⰋࢆ⾜࠺ࡘࡶࡾ ࡛࠶ࡿࠋ. ཧ⪃ᩥ⊩ [1]. Gsponer, Jörg, Urs Haberthür, and Amedeo Caflisch. "The. role of side-chain interactions in the early steps of aggregation: Molecular dynamics simulations of an amyloid-forming peptide from the yeast prion Sup35." Proceedings of the National Academy of Sciences 100.9 (2003): 5154-5159. [2]. Nguyen, Hung D., and Carol K. Hall. "Molecular. dynamics simulations of spontaneous fibril formation by randomcoil peptides." Proceedings of the National Academy of Sciences of the United States of America 101.46 (2004): 16180-16185. [3]. Abeln, Sanne, and Daan Frenkel. "Accounting for Protein-. Solvent Contacts Facilitates Design of Nonaggregating Lattice Proteins." Biophysical journal 100.3 (2011): 693-700. [4]. Abeln, Sanne, et al. "A Simple Lattice Model That. Captures Protein Folding, Aggregation and Amyloid Formation." PloS one 9.1 (2014): e85185. ᅗ 3  ᗘ࡟ࡼࡿࣔࣀ࣐࣮⋡ࡢኚ໬㸦ࢡࣛࢫࢱࡈ࡜㸧. [5]. Gharibi, Hussein, et al. "Mixed micellization of gemini. and conventional surfactant in aqueous solution: A lattice Monte Carlo simulation." Journal of Molecular Graphics and Modelling 53 (2014): 221-227.. ⓒ 2014 Information Processing Society of Japan. 2.

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