Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5031
Number of amino acids:397
Molecular Weight:44803.74 Da
Theoretical pI:5.61


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)307.56%
Cysteine CYS (C)51.26%
Glutamic Acid GLU (E)205.04%
Aspartic Acid ASP (D)266.55%
Glycine GLY (G)317.81%
Phynylalanine PHE (F)194.79%
Isoleucine ILE (I)225.54%
Histidine HIS (H)102.52%
Lysine LYS (K)215.29%
Methionine MET (M)133.27%
Leucine LEU (L)328.06%
Asparagine ASN (N)215.29%
Glutamine GLN (Q)164.03%
Proline PRO (P)102.52%
Serine SER (S)317.81%
Arginine ARG (R)164.03%
Threonine THR (T)174.28%
Tryptophan TRP (W)123.02%
Valine VAL (V)287.05%
Tyrosine TYR (Y)174.28%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2013
HydrogenH3059
NitrogenN535
OxygenO592
SulphurS18

FormulaC2013H3059N535O592S18
Total Number of Atoms:6217


Total number of positively charged residues (ARG + LYS):37
Total number of negatively charged residues (ASP + GLU):46
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    91580
Absorption 0.1% (=1 g/l)    2.044,   assuming all pairs of CYS residues form cystines

Ext. coefficient    91330
Absorption 0.1% (=1 g/l)    2.038,   assuming all CYS residues are reduced
Aromaticity:0.121

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.40

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.75, 23.43, 23.93]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:81.0579
Grand average of hydropathicity (GRAVY):-0.23