Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4273
Number of amino acids:417
Molecular Weight:45821.24 Da
Theoretical pI:8.14


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)4711.27%
Cysteine CYS (C)71.68%
Glutamic Acid GLU (E)174.08%
Aspartic Acid ASP (D)225.28%
Glycine GLY (G)368.63%
Phynylalanine PHE (F)102.4%
Isoleucine ILE (I)153.6%
Histidine HIS (H)71.68%
Lysine LYS (K)163.84%
Methionine MET (M)122.88%
Leucine LEU (L)317.43%
Asparagine ASN (N)296.95%
Glutamine GLN (Q)174.08%
Proline PRO (P)153.6%
Serine SER (S)409.59%
Arginine ARG (R)256%
Threonine THR (T)194.56%
Tryptophan TRP (W)163.84%
Valine VAL (V)225.28%
Tyrosine TYR (Y)143.36%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2005
HydrogenH3086
NitrogenN584
OxygenO615
SulphurS19

FormulaC2005H3086N584O615S19
Total Number of Atoms:6309


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):39
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    109235
Absorption 0.1% (=1 g/l)    2.384,   assuming all pairs of CYS residues form cystines

Ext. coefficient    108860
Absorption 0.1% (=1 g/l)    2.376,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.18

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.90, 28.78, 25.66]

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:69.5923
Grand average of hydropathicity (GRAVY):-0.43