There are 3 allergens thought to cause allergic reactions in pomegranates, these are called Pun g 1, Pun g 7 and Pun g 14.
Pun g 1 is a lipid transfer protein (LTP)
. Most cases of pomegranate allergy are linked to this protein.
Pun g 7 is a gibberellin regulared protein, gibberellins are plant growth hormones.
Pun g 14 is a chitinase protein. This is a plant derived enzyme made by plants naturally to act as a defence against fungal attacks. Chitinase is a protein associated with an allergy to latex.
Pomegranate allergy is seen in conjunction with allergies to other foods presenting as Latex Food Syndrome
, which is caused by the body confusing the proteins it encounters in food to that of latex proteins to which it is already sensitised.
LTPs are a group of proteins which can cause more serious allergic reactions in patients, you may suffer from LTP Syndrome
if you suffer IgE type allergy symptoms to foods mentioned in the cross reactivity section below.
Those with a sensitivity to chitinase may have linked allergies to foods which contain high levels of chitinase like chestnuts, banana, avocados, papaya, maize (corn), kiwi and tomatoes. Chitinase as an airway allergen is found in coffee, cockroaches and dust mite.
Common foods involved in LTP allergy include kiwi, strawberries, sunflower seeds, walnut, apple, mulberry, banana, pea, apricot, cherry, plum, almond, peach pomegranate, raspberry, tomato, grape, celery, peanut, asparagus, cabbage, broccoli, chestnut, lemon, tangerine, orange, hazelnut, lettuce, lentils, lupin, green bean, pear, mustard, wheat and maize.
Other plants containing gibberellin food allergens are chilli, bell pepper, orange, cherry, apricot and peach. Gibberellin airway allergens are cedar and cypress pollens.
Anaphylaxis Campaign - LTP Syndrome
ACAAI - Latex Allergy
Allergy information for: Pomegranate (Punica granatum )
Articles and Journals
Insights into pediatric pollen food allergy syndrome, 2020
Chitinases as Food Allergens, 2019
A new allergen family involved in pollen food-associated syndrome: Snakin/gibberellin-regulated proteins, 2018
Pomegranate chitinase III: Identification of a new allergen and analysis of sensitization patterns to chitinases, 2018
Pomegranate Cultivars: Identification of the New IgE-Binding Protein Pommaclein and Analysis of Antioxidant Variability, 2017
Pomegranate (Punica granatum L.) expresses several nsLTP isoforms characterized by different immunoglobulin E-binding properties, 2014
Cross-reactivity syndromes in food allergy, 2013
Anaphylactic reactions to pomegranate: identification and characterization of eliciting IgE-reactive components, 2011
Detection of Some Safe Plant-Derived Foods for LTP-Allergic Patients, 2007
Class I chitinases as potential panallergens involved in the latex-fruit syndrome, 1999
Latex allergy: clinical features and cross-reactivity with fruits, 1994
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