Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4012
Number of amino acids:426
Molecular Weight:44278.42 Da
Theoretical pI:9.66


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)225.16%
Cysteine CYS (C)71.64%
Glutamic Acid GLU (E)61.41%
Aspartic Acid ASP (D)102.35%
Glycine GLY (G)235.4%
Phynylalanine PHE (F)133.05%
Isoleucine ILE (I)173.99%
Histidine HIS (H)10.23%
Lysine LYS (K)307.04%
Methionine MET (M)61.41%
Leucine LEU (L)409.39%
Asparagine ASN (N)122.82%
Glutamine GLN (Q)133.05%
Proline PRO (P)13230.99%
Serine SER (S)399.15%
Arginine ARG (R)40.94%
Threonine THR (T)143.29%
Tryptophan TRP (W)30.7%
Valine VAL (V)286.57%
Tyrosine TYR (Y)61.41%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2075
HydrogenH3250
NitrogenN498
OxygenO543
SulphurS13

FormulaC2075H3250N498O543S13
Total Number of Atoms:6379


Total number of positively charged residues (ARG + LYS):34
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    25815
Absorption 0.1% (=1 g/l)    0.583,   assuming all pairs of CYS residues form cystines

Ext. coefficient    25440
Absorption 0.1% (=1 g/l)    0.575,   assuming all CYS residues are reduced
Aromaticity:0.052

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 95.68

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.12, 48.36, 17.37]

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:76.4084
Grand average of hydropathicity (GRAVY):-0.24