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文章數：69 |
 TANG Zhan 湯棧慶生氣氛夠嗎？》台中公益路聚餐推薦｜10大類型餐廳評比 |
| 在地生活｜大台北 2026/04/20 18:30:30 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
身為一個熱愛美食、喜歡在城市裡挖掘驚喜的人，臺中公益路一直是我最常出沒的地方之一。這條路可說是「臺中人的美食戰場」，從精緻西餐到創意火鍋，從日式丼飯到義式早午餐，每走幾步，就會有完全不同的特色料理餐廳。 這次我特別花了一整個月，實際造訪了公益路上十間口碑不錯的餐廳。有的是網友熱推的打卡名店，也有隱藏在巷弄裡的小驚喜。我以環境氛圍、口味表現、價格CP值與再訪意願為基準，整理出這篇實測評比。希望能幫正在猶豫去哪裡吃飯的你，找到那一間「吃完會想再來」的餐廳。 評比標準與整理方向
這次我走訪的10家餐廳橫跨不同料理類型，從高質感牛排館到巷弄系早午餐，每一間都有自己獨特的風格。為了讓整體比較更客觀，我依照以下四大面向進行評比，並搭配實際用餐體驗來打分。
整體而言，我希望這份評比不只是「哪家好吃」，而是幫你在不同情境下（約會、家庭聚餐、朋友小聚、商業午餐）都能快速找到合適的選擇。畢竟，美食不只是味覺的滿足，更是一段段與朋友共享的生活記憶。 10間臺中公益路餐廳評比懶人包公益路向來是臺中人聚餐的首選地段，從火鍋、燒肉到中式料理與早午餐，每走幾步就有驚喜。以下是我實際造訪過的10間代表性餐廳清單，橫跨平價、創意、高級各路風格。
一頭牛日式燒肉｜炭香濃郁的和牛饗宴，約會聚餐首選
走在公益路上，很難不被 一頭牛日式燒肉 的木質外觀吸引。低調卻不失質感的門面，搭配昏黃燈光與暖色調的內裝，讓人一進門就感受到濃濃的日式職人氛圍。店內空間不大，但桌距規劃得宜，每桌皆設有獨立排煙設備，烤肉時完全不怕滿身油煙味。 餐點特色
一頭牛的靈魂，絕對是他們招牌的「三國和牛拼盤」。 用餐體驗整體節奏掌握得非常好。店員會在你剛想烤下一片肉時貼心遞上夾子、幫忙換烤網，讓人完全不用分心。整場用餐過程就像一場表演，從視覺、嗅覺到味覺都被滿足。 綜合評分
地址：408臺中市南屯區公益路二段162號電話：04-23206800 小結語一頭牛日式燒肉不僅是「吃肉的地方」，更像是一場五感盛宴。從進門那一刻到最後一道甜點，都能感受到他們對細節的用心。 TANG Zhan 湯棧｜文青系火鍋代表，麻香湯底與視覺美感並重
在公益路這條美食戰線上，TANG Zhan 湯棧 是讓人一眼就會想走進去的那一種。 餐點特色
湯棧最有名的當然是它的「麻香鍋」。 用餐體驗整體氛圍比一般火鍋店更有質感。 綜合評分
地址：408臺中市南屯區公益路二段248號電話：04-22580617 官網：https://www.facebook.com/TangZhan.tw/ 小結語TANG Zhan 湯棧 把傳統火鍋做出新的樣貌保留臺式鍋物的溫度，又結合現代風格與細節服務，讓吃鍋這件事變得更有品味。 如果你想找一間兼具「好吃、好拍、好放鬆」的火鍋店，湯棧會是公益路上最有風格的選擇之一。 NINI 尼尼臺中店｜明亮寬敞的義式早午餐天堂
如果說前兩間是肉食愛好者的天堂，那 NINI 尼尼臺中店 絕對是想放鬆、聊聊天的好地方。餐廳外觀以白色系與大片玻璃窗為主，陽光灑進室內，讓人一踏入就有種度假般的輕盈感。假日早午餐時段特別熱鬧，建議提早訂位。 餐點特色
NINI 的菜單融合義式與臺灣人口味，選擇多樣且份量十足。主打的 松露燉飯 濃郁卻不膩口，米芯保留微Q口感；而 香蒜海鮮義大利麵 則以新鮮白蝦、花枝與淡菜搭配微辣蒜香，口感層次豐富。 用餐體驗店內氣氛輕鬆不拘謹，無論是一個人帶電腦工作、或朋友聚餐，都能找到舒服角落。餐點上桌速度穩定，服務人員態度親切、補水與收盤都非常主動。整體節奏讓人覺得「時間變慢了」，很適合想遠離忙碌日常的人。 綜合評分
地址：40861臺中市南屯區公益路二段18號電話：04-23288498 小結語NINI 尼尼臺中店是一間能讓人放下手機、慢慢吃飯的餐廳。餐點不追求浮誇，而是以「剛剛好」的份量與風味，陪伴每個平凡午後。如果你在找一間能邊吃邊聊天、拍照也漂亮的早午餐店，NINI 會是你在公益路上最不費力的幸福選擇。 加分100%浜中特選昆布鍋物｜平價卻用心的湯頭系火鍋，家庭聚餐好選擇
在公益路這條高質感餐廳林立的戰場上，加分100%浜中特選昆布鍋物 走的是截然不同的路線。它沒有浮誇的裝潢、也沒有高價位的套餐，但靠著實在的湯頭與親切的服務，默默吸引許多回頭客。每到用餐時間，總能看到家庭或情侶三兩成群地圍著鍋邊聊天。 餐點特色
主打 北海道浜中昆布湯底，湯頭清澈卻不單薄，越煮越能喝出海藻與柴魚的自然香氣。 用餐體驗整體氛圍偏家庭取向，桌距寬敞、座位舒適，帶小孩來也不覺擁擠。店員態度親切，補湯、收盤都很勤快，給人一種「被照顧著」的安心感。 綜合評分
地址：403臺中市西區公益路288號電話：0910855180 小結語加分100%浜中特選昆布鍋物是一間「不浮誇、但會讓人想再訪」的火鍋店。它不追求豪華擺盤，而是用最簡單的湯頭與新鮮食材，傳遞出家常卻不平凡的溫度。 印月餐廳｜中式料理的藝術演繹，宴客與家庭聚會首選
說到臺中公益路的中式料理代表，印月餐廳 絕對是榜上有名。這間開業多年的餐廳以「中菜西吃」的概念聞名，把傳統中式料理以現代手法重新詮釋。從建築外觀到餐具擺設，每個細節都散發著低調的典雅氣息。 餐點特色
印月最令人印象深刻的是他們將傳統中菜融入創意手法。 用餐體驗服務方面完全對得起餐廳的高級定位。從入座、點餐到上菜節奏，都拿捏得恰如其分。每道菜都會有服務人員細心介紹食材與吃法，讓人感受到「被款待」的尊榮感。 綜合評分
地址：408臺中市南屯區公益路二段818號電話：0422511155 小結語印月餐廳是一間「不只吃飯，更像品味生活」的地方。 KoDō 和牛燒肉｜極致職人精神，專為儀式感與頂級味覺而生
若要形容 KoDō 和牛燒肉 的用餐體驗，一句話足以總結——「像在欣賞一場關於肉的表演」。 餐點特色
這裡主打 日本A5和牛冷藏肉，以「精切厚燒」的方式呈現。 用餐體驗KoDō 的最大特色是「儀式感」。 綜合評分
地址：403臺中市西區公益路260號電話：0423220312 官網：https://www.facebook.com/kodo2018/ 小結語KoDō 和牛燒肉不是日常餐廳，而是一場體驗。 永心鳳茶｜在茶香裡用餐的優雅時光，臺味早午餐的新詮釋
走進 永心鳳茶公益店，彷彿進入一間有氣質的茶館。 餐點特色
永心鳳茶的餐點結合中式靈魂與西式擺盤，無論是「炸雞腿飯」還是「紅玉紅茶拿鐵」，都能讓人感受到熟悉卻不平凡的味道。 用餐體驗店內服務人員態度溫和，對茶品介紹詳盡。上餐節奏剛好，不急不徐。 綜合評分
地址：40360臺中市西區公益路68號三樓(勤美誠品)電話：0423221118 小結語永心鳳茶讓人重新定義「臺味」。 三希樓｜老饕級江浙功夫菜，穩重又帶人情味的中式饗宴
位於公益路上的 三希樓 是許多臺中老饕的口袋名單。 餐點特色
三希樓的菜色以 江浙與港式料理 為主，兼顧傳統與現代風味。 用餐體驗三希樓的服務給人一種老派但貼心的感覺。 綜合評分
地址：408臺中市南屯區公益路二段95號電話：0423202322 官網：https://www.sanxilou.com.tw/ 小結語三希樓是一間「吃得出功夫」的餐廳。 一笈壽司｜低調奢華的無菜單日料，職人手藝詮釋旬味極致
在熱鬧的公益路上，一笈壽司 低調得幾乎不顯眼。 餐點特色
一笈壽司採 Omakase（無菜單料理） 形式，每一餐都由主廚根據當日食材設計。 用餐體驗整場用餐約90分鐘，節奏緩慢但沉穩。 綜合評分
地址：408臺中市南屯區公益路二段25號電話：0423206368 官網：https://www.facebook.com/YIJI.sushi/ 小結語一笈壽司是一間真正讓人「放慢呼吸」的餐廳。 茶六燒肉堂｜人氣爆棚的和牛燒肉聖地，肉香與幸福感同時滿分
若要票選公益路上「最難訂位」的餐廳，茶六燒肉堂 絕對名列前茅。 餐點特色
茶六主打 和牛燒肉套餐，價格約落在 $700–$1000 間，份量與品質兼具。 用餐體驗茶六的服務效率相當高。店員親切、換網勤快、補水速度快，整場用餐流程流暢無壓力。 綜合評分
地址：403臺中市西區公益路268號電話：0423281167 官網：https://inline.app/booking/-L93VSXuz8o86ahWDRg0:inline-live-karuizawa/-LUYUEIOYwa7GCUpAFWA 小結語茶六燒肉堂用「穩定品質＋輕奢氛圍」抓住了臺中年輕族群的心。 吃完10家公益路餐廳後的心得與結語吃完這十家餐廳後，臺中公益路不只是一條美食街，而是一段生活風景線。 有的餐廳講究細膩與儀式感，像 一頭牛日式燒肉 與 一笈壽司，讓人感受到食材最純粹的美好 有的則以親切與溫度打動人心，像 加分昆布鍋物、永心鳳茶，讓人明白吃飯不只是為了飽足，而是一種被照顧的幸福。 而像茶六燒肉堂、TANG Zhan 湯棧 這類人氣名店，則用穩定的品質與熱絡的氛圍，成為許多臺中人心中「想吃肉就去那裡」的代名詞。 這十家店，構成了公益路最動人的縮影 有華麗的，也有溫柔的；有傳統的，也有創新的。 每一家都在自己的風格裡發光，讓人吃到的不只是料理，而是一種生活的溫度與節奏。 對我而言，這不僅是一場美食旅程，更是一趟關於「臺中味道」的回憶之旅。 FAQ：關於臺中公益路美食常見問題Q1：公益路哪一區的餐廳最集中？ Q2：需要提前訂位嗎？ 最後的話若要用一句話形容這趟美食之旅，我會說： 印月餐廳上餐速度快嗎？ 如果你也和我一樣喜歡用味蕾探索一座城市，那就把這篇公益路美食攻略收藏起來吧。加分100%浜中特選昆布鍋物尾牙聚餐表現如何？ 無論是約會、慶生、家庭聚餐，或只是想犒賞一下辛苦的自己——這條路上永遠會有一間剛剛好的餐廳在等你。NINI 尼尼臺中店單點比較好嗎？ 下一餐，不妨從這10家開始。加分100%浜中特選昆布鍋物網路評價符合期待嗎？ 打開手機、約上朋友，讓公益路成為你生活裡最容易抵達的小確幸。永心鳳茶甜點好吃嗎？ 如果你有私心愛店，也歡迎留言分享，茶六燒肉堂大型聚餐空間夠不夠？ 你的推薦，可能讓我下一趟美食旅程變得更精彩。一頭牛日式燒肉團體宴客合適嗎？ Researchers at the University of Utah Health have discovered that “time cells” in mice are crucial for learning tasks where timing is critical. These cells change their firing patterns as mice learn to distinguish between timed events, suggesting a role beyond just measuring time. This finding could help in the early detection of neurodegenerative diseases like Alzheimer’s by highlighting the importance of the medial entorhinal cortex (MEC), which is among the first brain regions affected by such diseases. Researchers at the University of Utah Health found that “time cells” in mice adapt to learning timed tasks, a discovery that could aid early Alzheimer’s detection by monitoring changes in a key brain region. Our perception of time is crucial to our interaction with and understanding of the world around us. Whether we’re engaging in a conversation or driving a car, we need to remember and gauge the duration of events—a complex but largely unconscious calculation running constantly beneath the surface of our thoughts. Now, researchers at the University of Utah Health have found that, in mice, a specific population of “time cells” is essential for learning complex behaviors where timing is critical. Like the second hand of a clock, time cells fire in sequence to map out short periods of time. But time cells aren’t just a simple clock, the researchers found—as animals learn to distinguish between differently timed events, the pattern of time cell activity changes to represent each pattern of events differently. The discovery could ultimately aid in the early detection of neurodegenerative diseases, such as Alzheimer’s, that affect the sense of time. The new study was published on June 14 in Nature Neuroscience. Mouse code By combining a complex time-based learning task with advanced brain imaging, researchers were able to watch patterns of time cell activity become more complex as the mice learned. The researchers first set up a trial where learning the differences in the timing of events was critical. To get a reward, mice had to learn to distinguish between patterns of an odor stimulus that had variable timing, as if they were learning a very simple form of Morse code. Left to right: James Heys, PhD; Erin Bigus; Hyunwoo Lee, PhD. Credit: Left to right: Charlie Ehlert, Matthieu Couriol, Kyung Jennifer Lee. Before and after the mice learned, the researchers used cutting-edge microscopy to watch individual time cells fire in real-time. At first, their time cells responded in the same way to every pattern of odor stimulus. But as they learned the differently timed patterns of stimulus, the mice developed different patterns of time cell activity for each pattern of events. Notably, during trials that the mice got wrong, the researchers could see that their time cells had often fired in the wrong order, suggesting that the right sequence of time cell activity is critical for performing time-based tasks. “Time cells are supposed to be active at specific moments during the trial,” said Hyunwoo Lee, PhD, a postdoctoral fellow in neurobiology in the Spencer Fox Eccles School of Medicine at the University of Utah and co-first author on the study. “But when the mice made mistakes, that selective activity became messy.” Not just a stopwatch Surprisingly, time cells play a more complicated role than merely tracking time, said Erin Bigus, graduate research assistant in neurobiology and co-first author on the study. When the researchers temporarily blocked the activity of the brain region that contains time cells, the medial entorhinal cortex (MEC), mice could still perceive and even anticipate the timing of events. But they couldn’t learn complex time-related tasks from scratch. “The MEC isn’t acting like a really simple stopwatch that’s necessary to track time in any simple circumstance,” Bigus said. “Its role seems to be in actually learning these more complex temporal relationships.” The researchers used advanced brain imaging to watch neurons fire before and after mice learned. Credit: Heys Lab / University of Utah Health Intriguingly, prior research on the MEC found that it’s also involved in learning spatial information and building “mental maps.” In the new study, researchers noticed that the patterns of brain activity that occur while learning time-based tasks show some similarities to previously observed patterns involved in spatial learning; aspects of both patterns persist even while an animal isn’t actively learning. While more research is needed, these results suggest that the brain could process space and time in fundamentally similar ways, according to the researchers. “We believe that the entorhinal cortex might serve a dual purpose, acting both as an odometer to track distance and as a clock to track elapsed time,” said James Heys, PhD, assistant professor in neurobiology and the senior author on the study. “These are the first areas of the brain to be affected by neurodegenerative diseases like Alzheimer’s. We are interested in exploring whether complex timing behavior tasks could be a useful way to detect the early onset of Alzheimer’s disease.” – James Heys Learning how the brain processes time could ultimately aid in the detection of neurodegenerative diseases such as Alzheimer’s, the researchers say. The MEC is one of the first areas of the brain that Alzheimer’s affects, hinting that complex timing tasks could potentially be a way to catch the disease early. Reference: “Medial entorhinal cortex mediates learning of context-dependent interval timing behavior” by Erin R. Bigus, Hyun-Woo Lee, John C. Bowler, Jiani Shi and James G. Heys, 14 June 2024, Nature Neuroscience. DOI: 10.1038/s41593-024-01683-7 The study was funded by the U.S. National Science Foundation, the Whitehall Foundation, the Brain and Behavior Research Foundation, the National Institute of Mental Health, the National Research Foundation of Korea, and the University of Utah. Utilizing DNA metabarcoding, a study by conservation biologists has precisely analyzed the dietary habits of elephants, revealing unexpected dietary diversity within groups. The findings have significant implications for wildlife conservation, emphasizing the necessity of diverse dietary resources for sustaining wildlife populations. A detailed analysis of the dietary habits of elephants showed surprising variation from meal to meal, which could have important ramifications for wildlife protection and conservation strategies. Elephants eat plants. That’s common knowledge to biologists and animal-loving schoolchildren alike. Yet figuring out exactly what kind of plants the iconic herbivores eat is more complicated. A new study from a global team that included Brown conservation biologists used innovative methods to efficiently and precisely analyze the dietary habits of two groups of elephants in Kenya, down to the specific types of plants eaten by which animals in the group. Their findings on the habits of individual elephants help answer important questions about the foraging behaviors of groups, and aid biologists in understanding the conservation approaches that best keep elephants not only sated but satisfied. The study was published today (July 5) in the journal Royal Society Open Science. “It’s really important for conservationists to keep in mind that when animals don’t get enough of the foods that they need, they may survive — but they may not prosper,” said study author Tyler Kartzinel, an assistant professor of environmental studies and of ecology, evolution and organismal biology at Brown. “By better understanding what each individual eats, we can better manage iconic species like elephants, rhinos, and bison to ensure their populations can grow in sustainable ways.” DNA Metabarcoding Transforms Conservation Research One of the main tools that the scientists used to conduct their study is called DNA metabarcoding, a cutting-edge genetic technique that allows researchers to identify the composition of biological samples by matching the extracted DNA fragments representing an elephant’s food to a library of plant DNA barcodes. Brown has been developing applications for this technology, said Kartzinel, and bringing together researchers from molecular biology and the computational side to solve problems faced by conservationists in the field. This is the first use of DNA metabarcoding to answer a long-term question about social foraging ecology, which is how members of a social group — such as a family — decide what foods to eat, Kartzinel said. “When I talk to non-ecologists, they are stunned to learn that we have never really had a clear picture of what all of these charismatic large mammals actually eat in nature,” Kartzinel said. “The reason is that these animals are difficult and dangerous to observe from up-close, they move long distances, they feed at night and in thick bush and a lot of the plants they feed on are quite small.” Not only are the elephants hard to monitor, but their food can be nearly impossible to identify by eye, even for an expert botanist, according to Kartzinel, who has conducted field research in Kenya. The research group compared the new genetic technique to a method called stable isotope analysis, which involves a chemical analysis of animal hair. Two of the study authors, George Wittemyer at Colorado State University and Thure Cerling at the University of Utah, had previously shown that elephants switch from eating fresh grasses when it rains to eating trees during the long dry season. While this advanced study allowed researchers to identify broad-scale dietary patterns, they still couldn’t discern the different types of plants in the elephant’s diet. Tracking Elephant Diets Through Time and Space The scientists had saved fecal samples that had been collected in partnership with the non-profit organization Save the Elephants when Wittemyer and Cerling were conducting the stable isotopes analyses almost 20 years ago. Study author Brian Gill, then a Brown post-doctoral associate, determined that the samples were still usable even after many years in storage. “By better understanding what each individual eats, we can better manage iconic species like elephants, rhinos and bison to ensure their populations can grow in sustainable ways.” Tyler R. Kartzinel, Assistant Professor of Environmental Studies, Assistant Professor of Ecology, Evolution, and Organismal Biology The team combined analyses of carbon-stable isotopes from the feces and hair of elephants with dietary DNA metabarcoding, GPS-tracking, and remote-sensing data to evaluate the dietary variation of individual elephants in two groups. They matched each unique DNA sequence in the sample to a collection of reference plants — developed with the botanical expertise of Paul Musili, director of the East Africa Herbarium at the National Museums of Kenya — and compared the diets of individual elephants through time. Why Elephants Forage Together Despite Dietary Differences In their analysis, they showed that dietary differences among individuals were often far greater than had been previously assumed, even among family members that foraged together on a given day. This study helps address a classic paradox in wildlife ecology, Kartzinel said: “How do social bonds hold family groups together in a world of limited resources?” In other words, given that elephants all seemingly eat the same plants, it’s not obvious why competition for food doesn’t push them apart and force them to forage independently. The simple answer is that elephants vary their diets based not only on what’s available but also on their preferences and physiological needs, said Kartzinel. A pregnant elephant, for example, may have different cravings and requirements at various times in her pregnancy. While the study wasn’t designed to explain social behavior, these findings help inform theories of why a group of elephants may forage together: The individual elephants don’t always eat exactly the same plants at the same time, so there will usually be enough plants to go around. These findings may offer valuable insights for conservation biologists. To protect elephants and other major species and create environments in which they can successfully reproduce and grow their populations, they need a variety of plants to eat. This may also decrease the chances of inter-species competition and prevent the animals from poaching human food sources, such as crops. “Wildlife populations need access to diverse dietary resources to prosper,” Kartzinel said. “Each elephant needs variety, a little bit of spice — not literally in their food, but in their dietary habits.” Reference: “Foraging history of individual elephants using DNA metabarcoding” by Brian A. Gill, George Wittemyer, Thure E. Cerling, Paul M. Musili and Tyler R. Kartzinel, 5 July 2023, Royal Society Open Science. DOI: 10.1098/rsos.230337 This work was supported by the National Science Foundation (DEB-1930820, DEB-2026294, DEB-2046797, and OIA-2033823). Researchers have used advanced imaging to reveal how the protein fascin flexibly bundles actin filaments into hexagonal structures within filopodia, which are essential for cell movement but can also promote cancer metastasis. This discovery not only solves a decades-old puzzle about filopodia assembly but also offers new insights that could refine therapies targeting metastatic cancers. Credit: SciTechDaily.com Filopodia help cells move but also aid cancer spread. Scientists have revealed how fascin proteins build these structures, paving the way for better cancer treatments. Some of the body’s cells remain in place for life, while others are free to move. To travel, these migratory cells rely on filopodia—sensitive, finger-like protrusions that extend from the cell membrane into the surrounding environment. In a healthy cell, filopodia can be lifesaving, such as when an immune cell rushes to the site of an infection. However, they can also cause harm, as metastatic cancer cells use them to invade new areas of the body. Filopodia are made up of hexagonal bundles of proteins that provide structure and strength. For more than 40 years, scientists have struggled to understand how these intricate bundles assemble. Now, researchers at Rockefeller University’s Laboratory of Structural Biophysics and Mechanobiology have solved a major piece of that puzzle, using advanced imaging technology to reveal how the underlying proteins form these cohesive structures. The findings, published in Nature Structural & Molecular Biology, may improve some cancer treatments already in development, says first author Rui Gong, a research associate in the lab. “Understanding the structure of filopodia and the changes they undergo may help to refine these therapies or inspire new ones,” he says. Where else this discovery leads remains to be seen. The study marks the first time such a complex higher-order protein assembly has been imaged at the atomic level—a technological advance that other scientists can now use to study similarly complex configurations. “Until now, it hasn’t really been possible to visualize their internal structure in any significant detail,” says lab head Gregory M. Alushin. “Going forward, hopefully, we’ve made it easier to study these protein networks, where function emerges at the level of thousands of molecules.” The forces at work Alushin’s lab specializes in understanding the cytoskeleton—the network of protein filaments, including actin, that form a cell’s infrastructure. Actin serves many functions: it provides cells with an overall shape; helps them to generate and detect forces in their environments; facilitates the formation of axonal connections between cells; and enables cellular movement via filopodia. These dynamic protein strands bend and flex, crisscross each other, and even engage in tugs of war. But they only work collectively. A single actin filament is useless on its own. “It’s like a floppy noodle,” Alushin says. “It’s not very strong, and it can’t do anything. Actin filaments have to be gathered into higher-order assemblies such as bundles to carry out any useful job.” A hexagonal bundle of actin filaments linked together by fascin proteins. Credit: Laboratory of Structural Biophysics and Mechanobiology at The Rockefeller University One type of higher-order assembly is the hexagonal bundle found within filopodia. A protein called fascin binds and bridges pairs of actin filaments, stitching them into bundles. These bundles are then encased in long membrane tubes to form filopodia, which must be strong enough to protrude beyond the cell and yet malleable enough to sweep the environment. “They hit a sweet spot between strength and flexibility,” Alushin says. How fascins manage this assembly has been a “known unknown” for decades. In the 1970s, scientists tried to re-create hexagonal bundles by using wooden dowels representing actin filaments with small bits of wood representing fascin-like bridges interspersed between them. It was impossible to create a bundle without distorting the ersatz fascin. A better view More recently, high-imaging technologies such as cryo-EM and tomography enabled the first images of these bundles, but they were only blurry glimpses. For the current study, the researchers, co-led by Gong and former Rockefeller graduate student Matthew Reynolds, significantly improved upon an computational image analysis approach they developed in 2022 that involves “denoising” the images. The result was the first clear three-dimensional images of fascin proteins as they bridged actin filaments. “We saw real bundles composed of thousands of fascin molecules and hundreds of actin filaments, and we were able to map their spatial positioning,” Gong says. “We saw how the structure of fascin gives rise to its function as an actin bundler and figured out the detailed chemistry of its actin-binding sites.” One of the most surprising findings was that fascin is quite improvisational. There are many ways for the protein to build a bundle. Fascin may have evolved this skill because of the questionable construction materials it has to work with. “Because actin filaments are like twisty ribbons, they’re not great for building a firm hexagonal structure like you find in filopodia,” Gong notes. To overcome this problem, fascin has a structural flexibility that allows it to slip in between the filaments in a variety of places and fold itself into the shape needed to link them together. “A fascin protein can accommodate all kinds of imperfections. It acts like a molecular hinge that can hold a number of intermediary positions between open and closed. It can also rotate its position for a better fit,” Alushin says. “Despite being a small and ostensibly simple protein, it has very complicated physical behaviors.” Stopping filopodia in their tracks Fascin dysregulation is a clinical biomarker for metastatic cancer. In migratory cells, an overabundance of fascin leads to a filopodia-building frenzy, which can accelerate metastasis. And stationary cells with too much fascin gain an abnormal—and dangerous—ability to move. “When this overexpression happens in cells that should be locked into place, such as epithelial cells, they can build filopodia, which they’re not supposed to have,” Alushin says. “Then they can crawl away from their neighbors and in the process abandon their regular cellular functions.” Their findings may help improve the design and effectiveness of fascin inhibitors, which are currently in clinical trials, Gong adds. These inhibitors aim to halt metastasis by preventing fascin from binding actin filaments and gathering them into bundles within filopodia. Immobilized, the cancer cells are stopped in their tracks. It was thought that the inhibitors work by blocking fascin’s actin-binding sites, but the Rockefeller researchers discovered that instead, they prevent fascin from undergoing the shape changes needed to fit in its binding location—a new understanding that the team hopes could translate into clinical applications. “We’ve been able to detail essential design principles for the bundles, which could be really helpful information for finding new ways to interfere with their construction,” Alushin says. Reference: “Fascin structural plasticity mediates flexible actin bundle construction” by Rui Gong, Matthew J. Reynolds, Keith R. Carney, Keith Hamilton, Tamara C. Bidone and Gregory M. Alushin, 20 January 2025, Nature Structural & Molecular Biology. DOI: 10.1038/s41594-024-01477-2 RRG455KLJIEVEWWF |
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