Journal profile · Biochemistry & Molecular Biology
Protein and Peptide Letters
ISSN 0929-8665 · eISSN 1875-5305 · Bentham Science Publishers B.V. · NETHERLANDS · Bimonthly · Founded 1994
Protein and Peptide Letters: CAS Zone 4 · Biology (2025 upgraded edition); impact factor 2.49; hybrid open access; median 84 days to acceptance (71 articles, last 24 months); community-reported acceptance: easy; 58 articles in 2025; indexed in SCIE and Scopus.
Scope
Aims, scope and focus
Protein and Peptide Letters is published by Bentham Science Publishers B.V. and is in Zone 4 of Biology in the CAS Journal Ranking (2025 upgraded edition). By OpenAlex counts of its recent articles, its largest topics are Protein Structure and Dynamics, Chemical Synthesis and Analysis and Enzyme Structure and Function, together about 23.2% of its articles. Its main subfields are Molecular Biology. (generated from OpenAlex topic counts and CAS ranking data)
Protein & Peptide Letters publishes letters, original research papers, mini-reviews and guest edited issues in all important aspects of protein and peptide research, including structural studies, advances in recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, and drug design. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallization and preliminary structure determination of biologically important proteins are considered only if they include significant new approaches or deal with proteins of immediate importance, and preliminary structure determinations of biologically important proteins. Purely theoretical/review papers should provide new insight into the principles of protein/peptide structure and function. Manuscripts describing computational work should include some experimental data to provide confirmation of the results of calculations. Protein & Peptide Letters focuses on: Structure Studies Advances in Recombinant Expression Drug Design Chemical Synthesis Function Pharmacology Enzymology Conformational Analysis Immunology Biotechnology Protein Engineering Protein Folding Sequencing Molecular Recognition Purification and Analysis
Source: LetPub
Research area (LetPub): Biochemistry & Molecular Biology
Main research topics OpenAlex counts of recent articles; shares are approximate
- Protein Structure and DynamicsBiochemistry, Genetics and Molecular Biology9%
- Chemical Synthesis and AnalysisBiochemistry, Genetics and Molecular Biology7.3%
- Enzyme Structure and FunctionMaterials Science6.9%
- Machine Learning in BioinformaticsBiochemistry, Genetics and Molecular Biology6.8%
- Antimicrobial Peptides and ActivitiesImmunology and Microbiology6.6%
- Enzyme Production and CharacterizationBiochemistry, Genetics and Molecular Biology5.6%
- Glycosylation and Glycoproteins ResearchBiochemistry, Genetics and Molecular Biology5.2%
- Monoclonal and Polyclonal Antibodies ResearchMedicine5.1%
Rankings & indexing
CAS ranking and database indexing
CAS Journal Ranking
CAS Journal Ranking, upgraded edition (March 2025)Biology Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Biology | Zone 4 |
| Minor | Biochemistry & Molecular Biology | Zone 4 |
Top journal: noReview journal: no
CAS Xinrui Journal Ranking (March 2026)Biology Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Biology | Zone 4 |
| Minor | Biochemistry & Molecular Biology | Zone 4 |
Top journal: noReview journal: not marked
CAS Journal Ranking, previous upgraded edition (December 2023)Biology Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Biology | Zone 4 |
| Minor | Biochemistry & Molecular Biology | Zone 4 |
Top journal: noReview journal: no
Database indexing
SCIEScopusLetPub
International journal early-warning lists: not listed in any editionLetPub
Editions, and major and minor categories, are shown separately and never merged into one zone; check which edition your institution uses before you submit or report.
Metrics
Impact metrics and publication volume
Impact
- Impact factor
- 2.49LetPub ·
- CiteScore 2026-06
- 2.8LetPub ·
- SJR 2026-06
- 0.47LetPub ·
- SNIP 2026-06
- 0.43LetPub ·
- h-index
- 50LetPub ·
- h-index
- 75OpenAlex ·
- i10-index
- 1,292OpenAlex ·
- 2-year mean citedness
- 4.35OpenAlex ·
- Self-citation rate
- 4%LetPub ·
- Share of gold OA articles
- 5.79%LetPub ·
Volume
- Articles per year
- 68LetPub ·
Articles by year OpenAlex count · 3,881 in total · the current year is incomplete
| Year | Articles | Open access | Citations |
|---|---|---|---|
| 2026 | 47 | 11 | 17 |
| 2025 | 58 | 4 | 235 |
| 2024 | 73 | 5 | 522 |
| 2023 | 102 | 9 | 565 |
| 2022 | 113 | 9 | 610 |
| 2021 | 104 | 12 | 725 |
Sources count differently and were observed at different times, so each source's own value is kept; "publisher" marks figures from the journal's website.
Review & acceptance
Review time and acceptance
Review time from article dates manuscript dates registered with Crossref · to
84 daysMedian, submission to acceptance · P25–P75 67 days – 108 days
- Acceptance to online
- median 154 days (71 articles)
- Submission to online
- median 241 days
- Sample
- 71 articles with submission and acceptance dates (134 in the window); the latest was accepted on
Only articles that were accepted and published are counted, not the time spent on rejected manuscripts, so this usually runs longer than a publisher's "time to first decision".
Other sources
- Average review time (community reports)
- about 2 monthsLetPub ·
- Average acceptance (community reports)
- EasyLetPub ·
Community reports come from authors' own submissions (confidence 0.5) and are not a promise from the journal; for publisher figures, the journal's own definitions apply.
Fees & open access
APC and open-access policy
Hybrid open accessLetPub
A subscription journal in which authors can pay to publish their article open access.
No source has fee information yet; check the journal's website.
A hybrid journal charges the APC only when the author chooses open access; publishing under the subscription model is usually free.
The journal's website is authoritative for fees; sources were observed at different times and each keeps its own value, without averaging.
Profile
Publication details and official links
- Publisher
- Bentham Science Publishers B.V.
- Country or region
- NETHERLANDS
- Language
- English
- Frequency
- Bimonthly
- Founded
- 1994
- ISSN
- 0929-8665
- Electronic ISSN
- 1875-5305
- Official links
- Journal homepage ↗LetPub
- Submission system ↗LetPub
FAQ
Frequently asked questions about Protein and Peptide Letters
What CAS zone is Protein and Peptide Letters in?
In the 2025 upgraded edition of the CAS Journal Ranking, Protein and Peptide Letters is in Zone 4 of Biology, and in Zone 4 of the minor category Biochemistry & Molecular Biology. In the 2026 Xinrui edition it is in Zone 4 of Biology. Zones from different editions, and from major and minor categories, are not interchangeable.
What is the impact factor of Protein and Peptide Letters?
The latest impact factor listed by LetPub is 2.49; CiteScore 2.8, h-index 75.
How long does peer review take at Protein and Peptide Letters?
Based on the dates recorded on 71 articles published between October 2024 and October 2026 (the last 24 months), the median time from submission to acceptance is 84 days (interquartile range 67–108 days); authors report an average review time of about 2 months; the community-reported acceptance is “Easy”. Article statistics cover accepted papers only, publisher figures follow the journal's own definitions, and community reports come from authors' own submissions; none is a promise from the journal.
Which databases index Protein and Peptide Letters?
According to LetPub and DOAJ records, Protein and Peptide Letters is indexed in SCIE and Scopus.
Is Protein and Peptide Letters open access, and what is the APC?
Protein and Peptide Letters is a hybrid journal. Fee information is not available yet; check the journal's website.
Sources and updates
The facts on this page come from LetPub, OpenAlex; every figure is tagged with its source and the date it was observed, and conflicting values are kept per source. LetPub source page: view ↗ (archived 2026-08-26). Last updated: .