Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5926
Number of amino acids:130
Molecular Weight:14247.38 Da
Theoretical pI:5.8


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)118.46%
Cysteine CYS (C)32.31%
Glutamic Acid GLU (E)75.38%
Aspartic Acid ASP (D)75.38%
Glycine GLY (G)86.15%
Phynylalanine PHE (F)75.38%
Isoleucine ILE (I)64.62%
Histidine HIS (H)10.77%
Lysine LYS (K)64.62%
Methionine MET (M)10.77%
Leucine LEU (L)1612.31%
Asparagine ASN (N)53.85%
Glutamine GLN (Q)96.92%
Proline PRO (P)43.08%
Serine SER (S)1310%
Arginine ARG (R)75.38%
Threonine THR (T)10.77%
Tryptophan TRP (W)00%
Valine VAL (V)1511.54%
Tyrosine TYR (Y)32.31%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC635
HydrogenH1021
NitrogenN173
OxygenO190
SulphurS4

FormulaC635H1021N173O190S4
Total Number of Atoms:2023


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    4595
Absorption 0.1% (=1 g/l)    0.323,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.314,   assuming all CYS residues are reduced
Aromaticity:0.077

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 51.05

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.15, 23.08, 26.92]

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:107.923
Grand average of hydropathicity (GRAVY):0.14