Page 35 - 《水产学报》2025年第6期
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雷丽娜,等 水产学报, 2025, 49(6): 069403
singal peptide β-1 domain
中国花鲈 L. maculatus 103
黄金鲈 Perca flavescens 103
白梭吻鲈 Sander lucioperc 103
M. miiuy 103
欧洲舌齿鲈 D. labrax 104
斜带石斑鱼 E. coioides 103
大菱鲆 Scophthalmus maximus 103
大西洋鲑 Salmo salar 104
卵形鲳鲹 Trachinotus ovatus 102
虹鳟 O. mykiss 106
β-2 domain CP
中国花鲈 L. maculatus 209
黄金鲈 Perca flavescens 209
白梭吻鲈 Sander lucioperc 209
M. miiuy 209
欧洲舌齿鲈 D. labrax 210
斜带石斑鱼 E. coioides 209
大菱鲆 Scophthalmus maximus 209
大西洋鲑 Salmo salar 210
卵形鲳鲹 Trachinotus ovatus 208
虹鳟 O. mykiss 212
TXR SXR
TM CYT
中国花鲈 L. maculatus 249
黄金鲈 Perca flavescens 249
白梭吻鲈 Sander lucioperc 249
M. miiuy 249
欧洲舌齿鲈 D. labrax 250
斜带石斑鱼 E. coioides 249
大菱鲆 Scophthalmus maximus 249
大西洋鲑 Salmo salar 245
卵形鲳鲹 Trachinotus ovatus 248
虹鳟 O. mykiss 247
(c)
图 2 中国花鲈 IgMH 可变区 (a)、恒定区 (b) 和 MHCⅡ β 与其他鱼类多序列比对
(a) Leader 为预测前导链、FR1~4 为 4 个骨架区、CDR1~3 为 3 个互补决定区,不同区域由“↓”分开,保守位点的半胱氨酸 (C) 用红色方框
标出,FR3 中保守的 DX3YYC 基序和 FR4 中保守 FDYWGKGT-VTV-S 基序用蓝色方框标出。(b) CH1~4 为 4 个恒定区,由“↓”分开;保守
的色氨酸 (W) 和半胱氨酸 (C) 用红色方框标出,形成链内二硫键的 2 个半胱氨酸用黑线连在一起;不同鱼类共有的色氨酸位点用“☆”标示,
键间二硫键用“L”标示。(c) signal peptide 为信号肽、β-1/β-2 domain 为 β-1/β-2 结构域、CP 为连接肽、TM 为跨膜区、CYT 为胞内区,为序
列上方显示了预测的信号肽、β-1 结构域、β-2 结构域、连接肽、跨膜区和胞内区,不同区域由“↓”分开;预测的蛋白激酶 C 磷酸化位点用
蓝色方框标出,TXR 和 SXR 为鱼类中保守的蛋白激酶 C 磷酸化位点;保守位点的半胱氨酸 (C) 用红色方框标出,N-乙酰化位点用横线标
出。物种名称及序列号:(a) (b) 中国花鲈 QWX94362.1,斜带石斑鱼 AAX78206.1,鳜 AAQ14862.1,大口黑鲈 QLF98876.1,大黄鱼
ACM24795.1,红笛鲷 ADX01345.1,尼罗罗非鱼 AAL99934.1,欧洲舌齿鲈 ARC77253.1,军曹鱼 AFN02400.1,黄尾鰤 AUT13231.1。(c) 中
国 花 鲈 AXY87851.1, 黄 金 鲈 XP_028420408.1, 白 吻 梭 鲈 XP_031172151.1, 鮸 AGJ70356.1, 欧 洲 舌 齿 鲈 CAJ34344.1, 斜 带 石 斑 鱼
ADZ99156.1,大菱鲆 AWO97408.1,大西洋鲑 CAA49726.1,卵形鲳鲹 APD68825.1,虹鳟 CBX11172.1。
Fig. 2 Multiple sequence alignment of IgMH variable region (a), constant region (b) and
MHCⅡ β between L. maculatus and other fish species
(a) Leader: predicted leader, FR1-4: four framework regions, CDR1-3: three complementarity determining regions; different regions are separated by "↓";
conserved cysteine (C) sites are marked with red boxes, and the conserved DX3YYC motif in FR3 and FDYWGKGT-VTV-S motif in FR4 are indicated
with blue boxes. (b) CH1-4 denote four constant regions, separated by "↓"; cysteine (C) and tryptophan (W) at conserved sites are marked with red boxes,
and the two cysteines that form a disulfide bond in the chain are connected together with a black line; conserved tryptophan sites shared by different fish
species are marked with “☆”, and the inter-bond disulfide bond is marked with "L". (c) regions corresponding to the putative signal peptide, β-1domain,
β-2domain, connecting peptide (CP), transmembrane region (TM) and cytoplasmic tail (CYT) are shown above the sequences, and separated by "↓"; pre-
dicted protein kinase C phosphorylation sites are marked with blue boxes, and TXR and SXR represent conserved protein kinase C phosphorylation sites
in fish; conserved cysteine (C) sites are marked with red boxes, and the N-acetylation site is marked with a horizontal line. Species and GenBank acces-
sion numbers: (a) (b) L. maculatus QWX94362.1, E. coioides AAX78206.1, S. chuatsi AAQ14862.1, M. salmoides QLF98876.1, L. crocea
ACM24795.1, Lutjanus sanguineus ADX01345.1, O. niloticus AAL99934.1, D. labrax ARC77253.1, Rachycentron canadum AFN02400.1, Seriola
lalandi AUT13231.1. (c) L. maculatus AXY87851.1, Perca flavescens XP_028420408.1, Sander lucioperc XP_031172151.1, M. miiuy AGJ70356.1, D.
labrax CAJ34344.1, E. coioides ADZ99156.1, Scophthalmus maximus AWO97408.1, Salmo salar CAA49726.1, Trachinotus ovatus APD68825.1, O.
mykiss CBX11172.1.
达的 IgMH 蛋白单体和 IgMHC 1- 2 蛋白多聚体反 草鱼的全血清没有交叉反应 (图 11)。
应,也能与中国花鲈全血清中相对分子质量在
3 讨论
55~95 ku 的蛋白条带发生强烈反应,与同属鮨
科的鳜的全血清发生弱反应,但与大口黑鲈和 当鱼体受病原侵袭时,其适应性 (获得性)
中国水产学会主办 sponsored by China Society of Fisheries https://www.china-fishery.cn
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